Remove redundant trim and mapNotNullToSet usage

src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/BatoToParser.kt

@@ -210,7 +210,7 @@ internal class BatoToParser(context: MangaLoaderContext) : PagedMangaParser(
 			.requireElementById("mainer")
 		val details = root.selectFirstOrThrow(".detail-set")
 		val attrs = details.selectFirst(".attr-main")?.select(".attr-item")?.associate {
-			it.child(0).text().trim() to it.child(1)
+			it.child(0).text() to it.child(1)
 		}.orEmpty()
 		return manga.copy(
 			title = root.selectFirst("h3.item-title")?.text() ?: manga.title,
@@ -227,7 +227,7 @@ internal class BatoToParser(context: MangaLoaderContext) : PagedMangaParser(
 				"Hiatus" -> MangaState.PAUSED
 				else -> manga.state
 			},
-			author = attrs["Authors:"]?.text()?.trim() ?: manga.author,
+			author = attrs["Authors:"]?.textOrNull() ?: manga.author,
 			chapters = root.selectFirst(".episode-list")
 				?.selectFirst(".main")
 				?.children()

src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaFireParser.kt

@@ -181,7 +181,7 @@ internal abstract class MangaFireParser(
 			coverUrl = document.selectFirstOrThrow("div.manga-detail div.poster img")
 				.attrAsAbsoluteUrl("src"),
 			tags = document.select("div.meta a[href*=/genre/]").mapNotNullToSet {
-				val tag = it.ownText().trim()
+				val tag = it.ownText()
 				if (tag == "Hentai" || tag == "Ecchi") {
 					isNsfw = true
 				}
@@ -189,7 +189,7 @@ internal abstract class MangaFireParser(
 			},
 			isNsfw = isNsfw,
 			state = document.selectFirst(".info > p")?.ownText()?.let {
-				when (it.lowercase().trim()) {
+				when (it.lowercase()) {
 					"releasing" -> MangaState.ONGOING
 					"completed" -> MangaState.FINISHED
 					"discontinued" -> MangaState.ABANDONED
@@ -199,7 +199,7 @@ internal abstract class MangaFireParser(
 				}
 			},
 			author = document.select("div.meta a[href*=/author/]")
-				.joinToString { it.ownText().trim() },
+				.joinToString { it.ownText() },
 			description = document.selectFirstOrThrow("#synopsis div.modal-content").html(),
 			chapters = getChapters(manga.url, document),
 		)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaReaderToParser.kt

@@ -62,7 +62,7 @@ internal class MangaReaderToParser(context: MangaLoaderContext) :
 
 		document.select("div.f-genre-item").map {
 			MangaTag(
-				title = it.ownText().trim(),
+				title = it.ownText().toTitleCase(sourceLocale),
 				key = it.attr("data-id"),
 				source = source,
 			)
@@ -176,7 +176,7 @@ internal class MangaReaderToParser(context: MangaLoaderContext) :
 				?.text()?.toFloatOrNull()?.div(10) ?: RATING_UNKNOWN,
 			coverUrl = document.selectFirst(".manga-poster > img")!!.attr("src"),
 			tags = document.select("div.genres > a[href*=/genre/]").mapNotNullToSet {
-				val tag = it.ownText().trim()
+				val tag = it.ownText()
 				if (tag == "Hentai" || tag == "Ecchi") {
 					isNsfw = true
 				}

src/main/kotlin/org/koitharu/kotatsu/parsers/site/animebootstrap/AnimeBootstrapParser.kt

@@ -146,7 +146,7 @@ internal abstract class AnimeBootstrapParser(
 		}
 
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text().toTitleCase().replace(",", ""),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/animebootstrap/fr/PapScan.kt

@@ -81,7 +81,7 @@ internal class PapScan(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain$listUrl").parseHtml()
-		return doc.select("a.category ").mapNotNullToSet { a ->
+		return doc.select("a.category ").mapToSet { a ->
 			val key = a.attr("href").substringAfterLast('=')
 			val name = a.text()
 			MangaTag(
@@ -103,7 +103,7 @@ internal class PapScan(context: MangaLoaderContext) :
 			MangaState.ONGOING
 		}
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ar/FlixScans.kt

@@ -132,7 +132,7 @@ internal class FlixScans(context: MangaLoaderContext) : PagedMangaParser(context
 		val doc = webClient.httpGet("https://$domain/search/advance").parseHtml()
 		val json = JSONArray(doc.requireElementById("__NUXT_DATA__").data())
 		val tagsList = json.getJSONArray(3).toString().replace("[", "").replace("]", "").split(",")
-		return tagsList.mapNotNullToSet { idTag ->
+		return tagsList.mapToSet { idTag ->
 			val id = idTag.toInt()
 			val idKey = json.getJSONObject(id).getInt("id")
 			val key = json.getInt(idKey).toString()

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ar/MangaStorm.kt

@@ -90,7 +90,7 @@ internal class MangaStorm(context: MangaLoaderContext) : PagedMangaParser(contex
 		return manga.copy(
 			altTitle = null,
 			state = null,
-			tags = root.select(".flex-wrap a").mapNotNullToSet { a ->
+			tags = root.select(".flex-wrap a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('/'),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ar/TeamXNovel.kt

@@ -125,7 +125,7 @@ internal class TeamXNovel(context: MangaLoaderContext) : PagedMangaParser(contex
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/series").parseHtml()
-		return doc.requireElementById("select_genre").select("option").mapNotNullToSet {
+		return doc.requireElementById("select_genre").select("option").mapToSet {
 			MangaTag(
 				key = it.attr("value"),
 				title = it.text().toTitleCase(sourceLocale),
@@ -155,7 +155,7 @@ internal class TeamXNovel(context: MangaLoaderContext) : PagedMangaParser(contex
 				"متوقف" -> MangaState.ABANDONED
 				else -> null
 			},
-			tags = doc.select(".review-author-info a").mapNotNullToSet { a ->
+			tags = doc.select(".review-author-info a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast("="),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/cupfox/CupFoxParser.kt

@@ -126,9 +126,9 @@ internal abstract class CupFoxParser(
 		return manga.copy(
 			altTitle = doc.selectFirst(selectMangaDetailsAltTitle)?.text()?.substringAfter("："),
 			state = null,
-			tags = doc.select(selectMangaDetailsTags).mapNotNullToSet { a ->
+			tags = doc.select(selectMangaDetailsTags).mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)
@@ -198,9 +198,9 @@ internal abstract class CupFoxParser(
 	protected open suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/category/").parseHtml()
 		return doc.select(selectAvailableTags)
-			.mapNotNullToSet { a ->
+			.mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/BeeToon.kt

@@ -92,7 +92,7 @@ internal class BeeToon(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/").parseHtml()
-		return doc.requireElementById("menu-item-3").select("ul.sub-menu li a").mapNotNullToSet {
+		return doc.requireElementById("menu-item-3").select("ul.sub-menu li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").removeSuffix('/').substringAfterLast('/'),
 				title = it.text(),
@@ -106,7 +106,7 @@ internal class BeeToon(context: MangaLoaderContext) :
 		return manga.copy(
 			description = doc.getElementById("desc")?.text().orEmpty(),
 			rating = doc.selectFirst(".counter")?.text()?.toFloatOrNull()?.div(5f) ?: RATING_UNKNOWN,
-			tags = doc.body().select(".info .genre a").mapNotNullToSet {
+			tags = doc.body().select(".info .genre a").mapToSet {
 				MangaTag(
 					key = it.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/ComicExtra.kt

@@ -114,7 +114,7 @@ internal class ComicExtra(context: MangaLoaderContext) : PagedMangaParser(contex
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/popular-comic").parseHtml()
-		return doc.select("li.tag-item a").mapNotNullToSet { a ->
+		return doc.select("li.tag-item a").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").substringAfterLast('/'),
 				title = a.text(),
@@ -133,9 +133,9 @@ internal class ComicExtra(context: MangaLoaderContext) : PagedMangaParser(contex
 				"Completed" -> MangaState.FINISHED
 				else -> null
 			},
-			tags = doc.select("dt.movie-dt:contains(Genres:) + dd a").mapNotNullToSet { a ->
+			tags = doc.select("dt.movie-dt:contains(Genres:) + dd a").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").substringAfterLast("/"),
+					key = a.attr("href").substringAfterLast('/'),
 					title = a.text(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/DynastyScans.kt

@@ -113,7 +113,7 @@ internal class DynastyScans(context: MangaLoaderContext) :
 					rating = RATING_UNKNOWN,
 					isNsfw = false,
 					coverUrl = "",
-					tags = div.select("span.tags a").mapNotNullToSet { a ->
+					tags = div.select("span.tags a").mapToSet { a ->
 						MangaTag(
 							key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 							title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/FlixScansOrg.kt

@@ -4,11 +4,7 @@ import kotlinx.coroutines.async
 import kotlinx.coroutines.coroutineScope
 import org.json.JSONArray
 import org.json.JSONObject
-import org.koitharu.kotatsu.parsers.Broken
-import org.koitharu.kotatsu.parsers.ErrorMessages
-import org.koitharu.kotatsu.parsers.MangaLoaderContext
-import org.koitharu.kotatsu.parsers.MangaSourceParser
-import org.koitharu.kotatsu.parsers.PagedMangaParser
+import org.koitharu.kotatsu.parsers.*
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.model.*
 import org.koitharu.kotatsu.parsers.util.*
@@ -115,7 +111,7 @@ internal class FlixScansOrg(context: MangaLoaderContext) :
 		val doc = webClient.httpGet("https://$domain/search/advance").parseHtml()
 		val json = JSONArray(doc.requireElementById("__NUXT_DATA__").data())
 		val tagsList = json.getJSONArray(3).toString().replace("[", "").replace("]", "").split(",")
-		return tagsList.mapNotNullToSet { idTag ->
+		return tagsList.mapToSet { idTag ->
 			val id = idTag.toInt()
 			val idKey = json.getJSONObject(id).getInt("id")
 			val key = json.getInt(idKey).toString()

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/MangaGeko.kt

@@ -96,7 +96,7 @@ internal class MangaGeko(context: MangaLoaderContext) : PagedMangaParser(context
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/browse-comics/").parseHtml()
-		return doc.selectFirstOrThrow("div.genre-select-i").select("label").mapNotNullToSet { label ->
+		return doc.selectFirstOrThrow("div.genre-select-i").select("label").mapToSet { label ->
 			MangaTag(
 				key = label.selectFirstOrThrow("input").attr("value"),
 				title = label.text(),
@@ -115,9 +115,9 @@ internal class MangaGeko(context: MangaLoaderContext) : PagedMangaParser(context
 				"Completed" -> MangaState.FINISHED
 				else -> null
 			},
-			tags = doc.select(".categories ul li a").mapNotNullToSet { a ->
+			tags = doc.select(".categories ul li a").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").substringAfterLast("="),
+					key = a.attr("href").substringAfterLast('='),
 					title = a.text(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/MangaKawaiiEn.kt

@@ -164,7 +164,7 @@ internal class MangaKawaiiEn(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/manga-list/").parseHtml()
-		return doc.select("ul li a.category").mapNotNullToSet { a ->
+		return doc.select("ul li a.category").mapToSet { a ->
 			val name = a.text()
 			val key = name.lowercase().replace(" ", "-").replace("é", "e").replace("è", "e")
 			MangaTag(

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/MangaTownParser.kt

@@ -126,7 +126,7 @@ internal class MangaTownParser(context: MangaLoaderContext) :
 					"completed" -> MangaState.FINISHED
 					else -> null
 				},
-				tags = li.selectFirst("p.keyWord")?.select("a")?.mapNotNullToSet tags@{ x ->
+				tags = li.selectFirst("p.keyWord")?.select("a")?.mapToSet tags@{ x ->
 					MangaTag(
 						title = x.attr("title").toTitleCase(),
 						key = x.attr("href").substringAfter("/directory/0-").substringBefore("-0-"),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/Mangaowl.kt

@@ -119,8 +119,8 @@ internal class Mangaowl(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/10-genres").parseHtml()
-		return doc.select("div.genres-container span.genre-item a").mapNotNullToSet { a ->
-			val key = a.attr("href").removeSuffix('/').substringAfterLast('/').substringBefore("-")
+		return doc.select("div.genres-container span.genre-item a").mapToSet { a ->
+			val key = a.attr("href").removeSuffix('/').substringAfterLast('/').substringBefore('-')
 			MangaTag(
 				key = key,
 				title = a.text(),
@@ -133,9 +133,9 @@ internal class Mangaowl(context: MangaLoaderContext) :
 		val fullUrl = manga.url.toAbsoluteUrl(domain)
 		val doc = webClient.httpGet(fullUrl).parseHtml()
 		manga.copy(
-			tags = doc.body().select("div.comic-attrs div.column.my-2:contains(Genres) a").mapNotNullToSet { a ->
+			tags = doc.body().select("div.comic-attrs div.column.my-2:contains(Genres) a").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/').substringBefore("-"),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/').substringBefore('-'),
 					title = a.text().toTitleCase().replace(",", ""),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/ManhwasMen.kt

@@ -99,9 +99,9 @@ internal class ManhwasMen(context: MangaLoaderContext) :
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val tags = webClient.httpGet("https://$domain/manga-list").parseHtml()
 			.selectLastOrThrow(".filter-bx .form-group select.custom-select").select("option").drop(1)
-		return tags.mapNotNullToSet { option ->
+		return tags.mapToSet { option ->
 			MangaTag(
-				key = option.attr("value").substringAfterLast("="),
+				key = option.attr("value").substringAfterLast('='),
 				title = option.text(),
 				source = source,
 			)
@@ -112,7 +112,7 @@ internal class ManhwasMen(context: MangaLoaderContext) :
 		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).parseHtml()
 		val simpleDateFormat = SimpleDateFormat("dd/MM/yyyy", sourceLocale)
 		return manga.copy(
-			tags = doc.body().select(".genres a").mapNotNullToSet { a ->
+			tags = doc.body().select(".genres a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/Pururin.kt

@@ -136,7 +136,7 @@ internal class Pururin(context: MangaLoaderContext) :
 		manga.copy(
 			description = doc.selectFirst("p.mb-2")?.text().orEmpty(),
 			rating = doc.selectFirst("td span.rating")?.attr("content")?.toFloatOrNull()?.div(5f) ?: RATING_UNKNOWN,
-			tags = doc.body().select("tr:contains(Contents) ul.list-inline a").mapNotNullToSet {
+			tags = doc.body().select("tr:contains(Contents) ul.list-inline a").mapToSet {
 				val href = it.attr("href").substringAfterLast("content/").substringBeforeLast('/')
 				MangaTag(
 					key = href,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/VyManga.kt

@@ -120,7 +120,7 @@ internal class VyManga(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/search").parseHtml()
-		return doc.select("#advance-search .check-genre .d-flex").mapNotNullToSet {
+		return doc.select("#advance-search .check-genre .d-flex").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow(".checkbox-genre").attr("data-value"),
 				title = it.selectFirstOrThrow("label").text(),
@@ -133,7 +133,7 @@ internal class VyManga(context: MangaLoaderContext) :
 		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).parseHtml()
 		val simpleDateFormat = SimpleDateFormat("MMM dd, yyy", sourceLocale)
 		return manga.copy(
-			tags = doc.select("div.col-md-7 p a[href*=genre]").mapNotNullToSet { a ->
+			tags = doc.select("div.col-md-7 p a[href*=genre]").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('/'),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/es/TuMangaOnlineParser.kt

@@ -176,9 +176,9 @@ internal class TuMangaOnlineParser(context: MangaLoaderContext) : PagedMangaPars
 		val contents = doc.body().selectFirstOrThrow("section.element-header-content")
 		return manga.copy(
 			description = contents.selectFirst("p.element-description")?.html(),
-			tags = contents.select("h6 a").mapNotNullToSet { a ->
+			tags = contents.select("h6 a").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").substringBefore("&").substringAfterLast("="),
+					key = a.attr("href").substringBefore('&').substringAfterLast('='),
 					title = a.text(),
 					source = source,
 				)
@@ -342,7 +342,7 @@ internal class TuMangaOnlineParser(context: MangaLoaderContext) : PagedMangaPars
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/library", getRequestHeaders()).parseHtml()
 		val elements = doc.body().select("div#books-genders > div > div")
-		return elements.mapNotNullToSet { element ->
+		return elements.mapToSet { element ->
 			MangaTag(
 				title = element.select("label").text(),
 				key = element.select("input").attr("value"),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fmreader/FmreaderParser.kt

@@ -159,7 +159,7 @@ internal abstract class FmreaderParser(
 
 	protected open suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
-		return doc.select(selectBodyTag).mapNotNullToSet { a ->
+		return doc.select(selectBodyTag).mapToSet { a ->
 			val href = a.attr("href").substringAfter(tagPrefix).substringBeforeLast(".html")
 			MangaTag(
 				key = href,
@@ -192,7 +192,7 @@ internal abstract class FmreaderParser(
 		val alt = doc.body().selectFirst(selectAlt)?.text()?.replace("Other names", "")
 		val auth = doc.body().selectFirst(selectAut)?.text()
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfter(tagPrefix).substringBeforeLast(".html"),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/LegacyScansParser.kt

@@ -172,7 +172,7 @@ internal class LegacyScansParser(context: MangaLoaderContext) :
 		val dateFormat = SimpleDateFormat("dd/MM/yyyy", Locale.FRENCH)
 		return manga.copy(
 			altTitle = null,
-			tags = root.select("div.serieGenre span").mapNotNullToSet { span ->
+			tags = root.select("div.serieGenre span").mapToSet { span ->
 				MangaTag(
 					key = span.text(),
 					title = span.text(),
@@ -221,7 +221,7 @@ internal class LegacyScansParser(context: MangaLoaderContext) :
 		val script = doc.requireElementById("__NUXT_DATA__").data()
 			.substringAfterLast("\"genres\"").substringBeforeLast("\"comics\"")
 			.split("\",\"").drop(1)
-		return script.mapNotNullToSet { tag ->
+		return script.mapToSet { tag ->
 			MangaTag(
 				key = tag.substringBeforeLast("\",{"),
 				title = tag.substringBeforeLast("\",{"),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/LireScan.kt

@@ -94,7 +94,7 @@ internal class LireScan(context: MangaLoaderContext) : PagedMangaParser(context,
 				else -> null
 			},
 			tags = root.select("ul.pmovie__list li:contains(Genre:)").text()
-				.replace("Genre:", "").split(" / ").mapNotNullToSet { tag ->
+				.replace("Genre:", "").split(" / ").mapToSet { tag ->
 					MangaTag(
 						key = tag.lowercase(),
 						title = tag,
@@ -142,7 +142,7 @@ internal class LireScan(context: MangaLoaderContext) : PagedMangaParser(context,
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/").parseHtml()
-		return doc.select(".nav-menu li a").mapNotNullToSet { a ->
+		return doc.select(".nav-menu li a").mapToSet { a ->
 			val key = a.attr("href").removeSuffix('/').substringAfterLast("manga/", "")
 			MangaTag(
 				key = key,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/MangaKawaii.kt

@@ -163,7 +163,7 @@ internal class MangaKawaii(context: MangaLoaderContext) : PagedMangaParser(conte
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/manga-list/").parseHtml()
-		return doc.select("ul li a.category").mapNotNullToSet { a ->
+		return doc.select("ul li a.category").mapToSet { a ->
 			val name = a.text()
 			val key = name.lowercase().replace(" ", "-").replace("é", "e").replace("è", "e")
 			MangaTag(

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/MangaMana.kt

@@ -186,7 +186,7 @@ internal class MangaMana(context: MangaLoaderContext) : PagedMangaParser(context
 				isNsfw = isNsfw,
 				coverUrl = img.orEmpty(),
 				description = div.selectFirst(".mangalist_item_description")?.text().orEmpty(),
-				tags = div.select("div.mb-1 a").mapNotNullToSet {
+				tags = div.select("div.mb-1 a").mapToSet {
 					val key = it.attr("href").substringAfterLast('=')
 					MangaTag(
 						key = key,
@@ -246,7 +246,7 @@ internal class MangaMana(context: MangaLoaderContext) : PagedMangaParser(context
 			author = doc.selectFirst("div.show_details span[itemprop=author]")?.text().orEmpty(),
 			description = doc.selectFirst("dd[itemprop=description]")?.text(),
 			rating = doc.getElementById("avgrating")?.ownText()?.toFloatOrNull()?.div(5f) ?: RATING_UNKNOWN,
-			tags = doc.select("ul.list-unstyled li a.category").mapNotNullToSet {
+			tags = doc.select("ul.list-unstyled li a.category").mapToSet {
 				val key = it.attr("href").substringAfterLast('=')
 				MangaTag(
 					key = key,
@@ -333,7 +333,7 @@ internal class MangaMana(context: MangaLoaderContext) : PagedMangaParser(context
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/liste-mangas").parseHtml()
-		return doc.select("select.selectpicker option").drop(1).mapNotNullToSet {
+		return doc.select("select.selectpicker option").drop(1).mapToSet {
 			MangaTag(
 				key = it.attr("value"),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/ScansMangasMe.kt

@@ -97,7 +97,7 @@ internal class ScansMangasMe(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/tous-nos-mangas/").parseHtml()
-		return doc.select("ul.genre li").mapNotNullToSet { li ->
+		return doc.select("ul.genre li").mapToSet { li ->
 			val key = li.selectFirstOrThrow("a").attr("href").removeSuffix('/').substringAfterLast('/')
 			val name = li.selectFirstOrThrow("a").text()
 			MangaTag(
@@ -116,7 +116,7 @@ internal class ScansMangasMe(context: MangaLoaderContext) :
 		val alt = doc.body().select("div.infox span.alter").text()
 		val aut = doc.select("div.spe span")[2].text().replace("Auteur:", "")
 		manga.copy(
-			tags = doc.select("div.spe span:contains(Genres) a").mapNotNullToSet { a ->
+			tags = doc.select("div.spe span:contains(Genres) a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fr/ScantradUnion.kt

@@ -130,7 +130,7 @@ internal class ScantradUnion(context: MangaLoaderContext) :
 				"Terminé", "Abondonné", "One Shot" -> MangaState.FINISHED
 				else -> null
 			},
-			tags = root.select("div.project-details a[href*=tag]").mapNotNullToSet { a ->
+			tags = root.select("div.project-details a[href*=tag]").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/fuzzydoodle/FuzzyDoodleParser.kt

@@ -193,7 +193,7 @@ internal abstract class FuzzyDoodleParser(
 			},
 			author = doc.selectFirst(selectAuthor)?.text().orEmpty(),
 			description = doc.select(selectDescription).text(),
-			tags = doc.select(selectTagManga).mapNotNullToSet {
+			tags = doc.select(selectTagManga).mapToSet {
 				val key = it.attr("href").substringAfterLast('=')
 				MangaTag(
 					key = key,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/galleryadults/all/NHentaiParser.kt

@@ -81,7 +81,7 @@ internal class NHentaiParser(context: MangaLoaderContext) :
 
 	private suspend fun fetchMangaTitle(url: String): String {
 		val doc = webClient.httpGet(url).parseHtml()
-		return doc.selectFirstOrThrow("h1.title").text().trim()
+		return doc.selectFirstOrThrow("h1.title").text()
 	}
 
 	override fun parseMangaList(doc: Document): List<Manga> {

src/main/kotlin/org/koitharu/kotatsu/parsers/site/id/HentaiCrot.kt

@@ -81,7 +81,7 @@ internal class HentaiCrot(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.select("ul.megamenu li").mapNotNullToSet { li ->
+		return doc.select("ul.megamenu li").mapToSet { li ->
 			val key = li.selectFirstOrThrow("a").attr("href").removeSuffix('/').substringAfterLast('/')
 			val name = li.selectFirstOrThrow("a").text()
 			MangaTag(

src/main/kotlin/org/koitharu/kotatsu/parsers/site/id/PixHentai.kt

@@ -81,7 +81,7 @@ internal class PixHentai(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.select("ul.megamenu li").mapNotNullToSet { li ->
+		return doc.select("ul.megamenu li").mapToSet { li ->
 			val key = li.selectFirstOrThrow("a").attr("href").removeSuffix('/').substringAfterLast('/')
 			val name = li.selectFirstOrThrow("a").text()
 			MangaTag(

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ja/NicovideoSeigaParser.kt

@@ -96,7 +96,7 @@ internal class NicovideoSeigaParser(context: MangaLoaderContext) :
 				tags = item.getElementsByAttributeValueContaining("href", "?category=").mapToSet { a ->
 					MangaTag(
 						key = a.attr("href").substringAfterLast('='),
-						title = a.ownText().trim(),
+						title = a.ownText(),
 						source = source,
 					)
 				},
@@ -187,7 +187,7 @@ internal class NicovideoSeigaParser(context: MangaLoaderContext) :
 				url = href,
 				publicUrl = href.toAbsoluteUrl(item.host ?: domain),
 				title = item.selectFirst(".search_result__item__info > .search_result__item__info--title > a")
-					?.text()?.trim() ?: return@mapNotNull null,
+					?.textOrNull() ?: return@mapNotNull null,
 				altTitle = null,
 				author = null,
 				tags = emptySet(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/keyoapp/KeyoappParser.kt

@@ -131,7 +131,7 @@ internal abstract class KeyoappParser(
 			title = div.selectFirstOrThrow("h3").text().orEmpty(),
 			altTitle = null,
 			rating = RATING_UNKNOWN,
-			tags = div.select("div.gap-1 a").mapNotNullToSet { a ->
+			tags = div.select("div.gap-1 a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text().toTitleCase(),
@@ -169,7 +169,7 @@ internal abstract class KeyoappParser(
 		val doc = webClient.httpGet(fullUrl).parseHtml()
 		val dateFormat = SimpleDateFormat(datePattern, sourceLocale)
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/likemanga/LikeMangaParser.kt

@@ -127,9 +127,9 @@ internal abstract class LikeMangaParser(
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/genres/").parseHtml()
-		return doc.select("ul.nav-genres li:not(.text-center) a").mapNotNullToSet { a ->
+		return doc.select("ul.nav-genres li:not(.text-center) a").mapToSet { a ->
 			MangaTag(
-				key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+				key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 				title = a.text(),
 				source = source,
 			)
@@ -152,9 +152,9 @@ internal abstract class LikeMangaParser(
 		return manga.copy(
 			altTitle = doc.selectFirstOrThrow(".list-info li.othername h2").text(),
 			state = null,
-			tags = doc.select("li.kind a").mapNotNullToSet { a ->
+			tags = doc.select("li.kind a").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/MadaraParser.kt

@@ -508,7 +508,7 @@ internal abstract class MadaraParser(
 		val keySet = HashSet<String>(list.size)
 		return list.mapNotNullToSet { li ->
 			val a = li.selectFirst("a") ?: return@mapNotNullToSet null
-			val href = a.attr("href").removeSuffix("/").substringAfterLast(tagPrefix, "")
+			val href = a.attr("href").removeSuffix('/').substringAfterLast(tagPrefix, "")
 			if (href.isEmpty() || !keySet.add(href)) {
 				return@mapNotNullToSet null
 			}
@@ -560,12 +560,12 @@ internal abstract class MadaraParser(
 			}
 		}
 
-		val alt = doc.body().select(selectAlt).firstOrNull()?.tableValue()?.text()?.trim()
+		val alt = doc.body().select(selectAlt).firstOrNull()?.tableValue()?.textOrNull()
 
 		manga.copy(
 			url = href,
 			publicUrl = href.toAbsoluteUrl(domain),
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/all/Manga18Fx.kt

@@ -94,8 +94,8 @@ internal class Manga18Fx(context: MangaLoaderContext) :
 			}
 			MangaTag(
 				key = href,
-				title = a.ownText().trim().ifEmpty {
-					a.selectFirst(".menu-image-title")?.text()?.trim() ?: return@mapNotNullToSet null
+				title = a.ownText().ifEmpty {
+					a.selectFirst(".menu-image-title")?.text() ?: return@mapNotNullToSet null
 				}.toTitleCase(),
 				source = source,
 			)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/all/Manhwa18Cc.kt

@@ -100,8 +100,8 @@ internal class Manhwa18Cc(context: MangaLoaderContext) :
 			}
 			MangaTag(
 				key = href,
-				title = a.ownText().trim().ifEmpty {
-					a.selectFirst(".menu-image-title")?.text()?.trim() ?: return@mapNotNullToSet null
+				title = a.ownText().ifEmpty {
+					a.selectFirst(".menu-image-title")?.text() ?: return@mapNotNullToSet null
 				}.toTitleCase(),
 				source = source,
 			)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/AdultWebtoon.kt

@@ -15,7 +15,7 @@ import org.koitharu.kotatsu.parsers.model.*
 import org.koitharu.kotatsu.parsers.site.madara.MadaraParser
 import org.koitharu.kotatsu.parsers.util.*
 import java.text.SimpleDateFormat
-import java.util.Base64
+import java.util.*
 
 @MangaSourceParser("ADULT_WEBTOON", "AdultWebtoon", "en", ContentType.HENTAI)
 internal class AdultWebtoon(context: MangaLoaderContext) :
@@ -106,11 +106,11 @@ internal class AdultWebtoon(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/HentaiManga.kt

@@ -100,13 +100,13 @@ internal class HentaiManga(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/HentaiWebtoon.kt

@@ -100,13 +100,13 @@ internal class HentaiWebtoon(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/IsekaiScan.kt

@@ -93,7 +93,7 @@ internal class IsekaiScan(context: MangaLoaderContext) :
 					)
 				}.orEmpty(),
 				author = summary?.selectFirst(".mg_author")?.selectFirst("a")?.ownText(),
-				state = when (summary?.selectFirst(".mg_status")?.selectFirst(".summary-content")?.ownText()?.trim()
+				state = when (summary?.selectFirst(".mg_status")?.selectFirst(".summary-content")?.ownText()
 					?.lowercase()) {
 					"ongoing" -> MangaState.ONGOING
 					"completed " -> MangaState.FINISHED

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/MangaDass.kt

@@ -123,12 +123,13 @@ internal class MangaDass(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim() ?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
-				.firstOrNull()?.tableValue()?.text()?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
+				?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
+					.firstOrNull()?.tableValue()?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/MangaDna.kt

@@ -116,14 +116,15 @@ internal class MangaDna(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim() ?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
-				.firstOrNull()?.tableValue()?.text()?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
+				?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
+					.firstOrNull()?.tableValue()?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/MangaPure.kt

@@ -98,7 +98,7 @@ internal class MangaPure(context: MangaLoaderContext) :
 					)
 				}.orEmpty(),
 				author = summary?.selectFirst(".mg_author")?.selectFirst("a")?.ownText(),
-				state = when (summary?.selectFirst(".mg_status")?.selectFirst(".summary-content")?.ownText()?.trim()
+				state = when (summary?.selectFirst(".mg_status")?.selectFirst(".summary-content")?.ownText()
 					?.lowercase()) {
 					"ongoing" -> MangaState.ONGOING
 					"completed" -> MangaState.FINISHED

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/ManhwaHentai.kt

@@ -54,12 +54,13 @@ internal class ManhwaHentai(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim() ?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
-				.firstOrNull()?.tableValue()?.text()?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
+				?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
+					.firstOrNull()?.tableValue()?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/en/ManyToon.kt

@@ -103,11 +103,11 @@ internal class ManyToon(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/es/MangasNoSekai.kt

@@ -6,12 +6,7 @@ import org.jsoup.nodes.Document
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaSourceParser
 import org.koitharu.kotatsu.parsers.exception.ParseException
-import org.koitharu.kotatsu.parsers.model.Manga
-import org.koitharu.kotatsu.parsers.model.MangaChapter
-import org.koitharu.kotatsu.parsers.model.MangaPage
-import org.koitharu.kotatsu.parsers.model.MangaParserSource
-import org.koitharu.kotatsu.parsers.model.MangaState
-import org.koitharu.kotatsu.parsers.model.MangaTag
+import org.koitharu.kotatsu.parsers.model.*
 import org.koitharu.kotatsu.parsers.site.madara.MadaraParser
 import org.koitharu.kotatsu.parsers.util.*
 import java.text.SimpleDateFormat
@@ -26,9 +21,9 @@ internal class MangasNoSekai(context: MangaLoaderContext) :
 		val body = doc.body()
 		val chaptersDeferred = async { loadChapters(manga.url, doc) }
 		manga.copy(
-			tags = doc.body().select("#section-sinopsis a[href*=genre]").mapNotNullToSet { a ->
+			tags = doc.body().select("#section-sinopsis a[href*=genre]").mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/id/ManhwaHub.kt

@@ -102,8 +102,8 @@ internal class ManhwaHub(context: MangaLoaderContext) :
 			val href = a.attr("href").removeSuffix("/").substringAfterLast(tagPrefix, "")
 			MangaTag(
 				key = href,
-				title = a.ownText().trim().ifEmpty {
-					a.selectFirst(".menu-image-title")?.text()?.trim() ?: return@mapNotNullToSet null
+				title = a.ownText().ifEmpty {
+					a.selectFirst(".menu-image-title")?.text() ?: return@mapNotNullToSet null
 				}.toTitleCase(),
 				source = source,
 			)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/vi/Saytruyenhay.kt

@@ -139,14 +139,15 @@ internal class Saytruyenhay(context: MangaLoaderContext) :
 		}
 
 		val alt =
-			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()?.text()
-				?.trim() ?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
-				.firstOrNull()?.tableValue()?.text()?.trim()
+			doc.body().select(".post-content_item:contains(Alt) .summary-content").firstOrNull()?.tableValue()
+				?.textOrNull()
+				?: doc.body().select(".post-content_item:contains(Nomes alternativos: ) .summary-content")
+					.firstOrNull()?.tableValue()?.textOrNull()
 
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast('/'),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madtheme/MadthemeParser.kt

@@ -123,7 +123,7 @@ internal abstract class MadthemeParser(
 				title = div.selectFirst("div.meta")?.selectFirst("div.title")?.text().orEmpty(),
 				altTitle = null,
 				rating = div.selectFirst("div.meta span.score")?.ownText()?.toFloatOrNull()?.div(5f) ?: RATING_UNKNOWN,
-				tags = doc.body().select("div.meta div.genres span").mapNotNullToSet { span ->
+				tags = doc.body().select("div.meta div.genres span").mapToSet { span ->
 					MangaTag(
 						key = span.attr("class"),
 						title = span.text().toTitleCase(),
@@ -179,7 +179,7 @@ internal abstract class MadthemeParser(
 		val nsfw = doc.getElementById("adt-warning") != null
 
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase().replace(",", ""),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/manga18/Manga18Parser.kt

@@ -157,7 +157,7 @@ internal abstract class Manga18Parser(
 		val alt = body.selectFirst(selectAlt)?.text().takeIf { it != "Updating" || it.isNotEmpty() }
 		val author = body.selectFirst(selectAuthor)?.text().takeIf { it != "Updating" }
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangabox/MangaboxParser.kt

@@ -144,7 +144,7 @@ internal abstract class MangaboxParser(
 	protected open suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
 		val tags = doc.select(selectTagMap).drop(1) // remove all tags
-		return tags.mapNotNullToSet { a ->
+		return tags.mapToSet { a ->
 			val key = a.attr("href").removeSuffix('/').substringAfterLast('/')
 			val name = a.attr("title").replace(" Manga", "")
 			MangaTag(
@@ -177,7 +177,7 @@ internal abstract class MangaboxParser(
 		val alt = doc.body().select(selectAlt).text().replace("Alternative : ", "")
 		val aut = doc.body().select(selectAut).eachText().joinToString()
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast("category=").substringBefore("&"),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangabox/en/Mangairo.kt

@@ -111,7 +111,7 @@ internal class Mangairo(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl/type-latest/ctg-all/state-all/page-1").parseHtml()
-		return doc.select("div.panel_category a:not(.ctg_select)").mapNotNullToSet { a ->
+		return doc.select("div.panel_category a:not(.ctg_select)").mapToSet { a ->
 			val key = a.attr("href").substringAfterLast("ctg-").substringBefore("/")
 			val name = a.attr("title").replace("Category ", "")
 			MangaTag(
@@ -139,7 +139,7 @@ internal class Mangairo(context: MangaLoaderContext) :
 		val alt = doc.body().select(selectAlt).text().replace("Alternative : ", "")
 		val aut = doc.body().select(selectAut).eachText().joinToString()
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href")
 						.substringAfterLast("page-"), // Yes the site, it's crashing between page is tag id

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangabox/en/Mangakakalot.kt

@@ -101,7 +101,7 @@ internal class Mangakakalot(context: MangaLoaderContext) :
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
 		val tags = doc.select("ul.tag li a").drop(1)
-		return tags.mapNotNullToSet { a ->
+		return tags.mapToSet { a ->
 			val key = a.attr("href").substringAfterLast("category=").substringBefore("&")
 			val name = a.attr("title").replace(" Manga", "")
 			MangaTag(

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangabox/en/MangakakalotTv.kt

@@ -111,7 +111,7 @@ internal class MangakakalotTv(context: MangaLoaderContext) :
 		val alt = doc.body().select(selectAlt).text().replace("Alternative : ", "")
 		val aut = doc.body().select(selectAut).eachText().joinToString()
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast("category=").substringBefore("&"),
 					title = a.text().toTitleCase(),
@@ -131,7 +131,7 @@ internal class MangakakalotTv(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
-		return doc.select(selectTagMap).mapNotNullToSet { a ->
+		return doc.select(selectTagMap).mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").substringAfterLast("category=").substringBefore("&"),
 				title = a.attr("title"),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangareader/es/TuManhwas.kt

@@ -95,7 +95,7 @@ internal class TuManhwas(context: MangaLoaderContext) :
 			state = mangaState,
 			author = null,
 			isNsfw = manga.isNsfw || nsfw,
-			tags = docs.select(".wd-full .mgen > a").mapNotNullToSet { a ->
+			tags = docs.select(".wd-full .mgen > a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mangaworld/MangaWorldParser.kt

@@ -143,7 +143,7 @@ internal abstract class MangaWorldParser(
 		return doc.select(".comics-grid .entry").map { div ->
 			val href = div.selectFirstOrThrow("a.thumb").attrAsRelativeUrl("href")
 			val tags = div.select(".genres a[href*=/archive?genre=]")
-				.mapNotNullToSet { MangaTag(it.ownText().toTitleCase(sourceLocale), it.attr("href"), source) }
+				.mapToSet { MangaTag(it.ownText().toTitleCase(sourceLocale), it.attr("href"), source) }
 			Manga(
 				id = generateUid(href),
 				url = href,
@@ -155,13 +155,13 @@ internal abstract class MangaWorldParser(
 				tags = tags,
 				author = div.selectFirst(".author a")?.text(),
 				state =
-				when (div.selectFirst(".status a")?.text()?.lowercase()) {
-					"in corso" -> MangaState.ONGOING
-					"finito" -> MangaState.FINISHED
-					"droppato" -> MangaState.ABANDONED
-					"in pausa" -> MangaState.PAUSED
-					else -> null
-				},
+					when (div.selectFirst(".status a")?.text()?.lowercase()) {
+						"in corso" -> MangaState.ONGOING
+						"finito" -> MangaState.FINISHED
+						"droppato" -> MangaState.ABANDONED
+						"in pausa" -> MangaState.PAUSED
+						else -> null
+					},
 				source = source,
 				isNsfw = isNsfwSource,
 			)
@@ -171,7 +171,7 @@ internal abstract class MangaWorldParser(
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/").parseHtml()
-		return doc.select("div[aria-labelledby=genresDropdown] a").mapNotNullToSet {
+		return doc.select("div[aria-labelledby=genresDropdown] a").mapToSet {
 			MangaTag(
 				key = it.attr("href").substringAfterLast('='),
 				title = it.text().toTitleCase(sourceLocale),
@@ -184,30 +184,30 @@ internal abstract class MangaWorldParser(
 		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).parseHtml()
 		return manga.copy(
 			altTitle =
-			doc.selectFirst(".meta-data .font-weight-bold:contains(Titoli alternativi:)")
-				?.parent()
-				?.ownText()
-				?.substringAfter(": ")
-				?.trim(),
+				doc.selectFirst(".meta-data .font-weight-bold:contains(Titoli alternativi:)")
+					?.parent()
+					?.ownText()
+					?.substringAfter(": ")
+					?.trim(),
 			description = doc.getElementById("noidungm")?.text().orEmpty(),
 			chapters =
-			doc.select(".chapters-wrapper .chapter a").mapChapters(reversed = true) { i, a ->
-				val url = a.attrAsRelativeUrl("href").toAbsoluteUrl(domain)
-				MangaChapter(
-					id = generateUid(url),
-					name = a.selectFirst("span.d-inline-block")?.text() ?: "Chapter : ${i + 1f}",
-					number = i + 1f,
-					volume = 0,
-					url = "$url?style=list",
-					scanlator = null,
-					uploadDate =
-					SimpleDateFormat("dd MMMM yyyy", Locale.ITALIAN).tryParse(
-						a.selectFirst(".chap-date")?.text(),
-					),
-					branch = null,
-					source = source,
-				)
-			},
+				doc.select(".chapters-wrapper .chapter a").mapChapters(reversed = true) { i, a ->
+					val url = a.attrAsRelativeUrl("href").toAbsoluteUrl(domain)
+					MangaChapter(
+						id = generateUid(url),
+						name = a.selectFirst("span.d-inline-block")?.text() ?: "Chapter : ${i + 1f}",
+						number = i + 1f,
+						volume = 0,
+						url = "$url?style=list",
+						scanlator = null,
+						uploadDate =
+							SimpleDateFormat("dd MMMM yyyy", Locale.ITALIAN).tryParse(
+								a.selectFirst(".chap-date")?.text(),
+							),
+						branch = null,
+						source = source,
+					)
+				},
 		)
 	}
 

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mmrcms/MmrcmsParser.kt

@@ -197,7 +197,7 @@ internal abstract class MmrcmsParser(
 		val auth = doc.body().selectFirst(selectAut)?.nextElementSibling()?.text()
 		val tags = doc.body().selectFirst(selectTag)?.nextElementSibling()?.select("a") ?: emptySet()
 		manga.copy(
-			tags = tags.mapNotNullToSet { a ->
+			tags = tags.mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/mmrcms/ar/Onma.kt

@@ -59,7 +59,7 @@ internal class Onma(context: MangaLoaderContext) :
 		val auth = doc.body().selectFirst(selectAut)?.text()
 		val tags = doc.body().selectFirst(selectTag)?.select("a") ?: emptySet()
 		manga.copy(
-			tags = tags.mapNotNullToSet { a ->
+			tags = tags.mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/nepnep/NepnepParser.kt

@@ -201,7 +201,7 @@ internal abstract class NepnepParser(
 
 				else -> null
 			},
-			tags = doc.select(".list-group-item:contains(Genre(s):) a").mapNotNullToSet { a ->
+			tags = doc.select(".list-group-item:contains(Genre(s):) a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/otakusanctuary/OtakuSanctuaryParser.kt

@@ -127,8 +127,8 @@ internal abstract class OtakuSanctuaryParser(
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/Home/LoadingGenresMenu").parseHtml()
-		return doc.select(selectBodyTag).mapNotNullToSet { a ->
-			val href = a.attr("href").substringAfterLast("/").substringBefore("?")
+		return doc.select(selectBodyTag).mapToSet { a ->
+			val href = a.attr("href").substringAfterLast('/').substringBefore('?')
 			MangaTag(
 				key = href,
 				title = a.text(),
@@ -165,8 +165,8 @@ internal abstract class OtakuSanctuaryParser(
 		val dateFormat = SimpleDateFormat(datePattern, sourceLocale)
 
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
-				val href = a.attr("href").substringAfterLast("/").substringBefore("?")
+			tags = doc.body().select(selectTag).mapToSet { a ->
+				val href = a.attr("href").substringAfterLast('/').substringBefore('?')
 				MangaTag(
 					key = href,
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/BrMangas.kt

@@ -110,7 +110,7 @@ internal class BrMangas(context: MangaLoaderContext) : PagedMangaParser(context,
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/lista-de-generos-de-manga/").parseHtml()
-		return doc.select(".genres_page a").mapNotNullToSet { a ->
+		return doc.select(".genres_page a").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 				title = a.text(),
@@ -124,7 +124,7 @@ internal class BrMangas(context: MangaLoaderContext) : PagedMangaParser(context,
 		return manga.copy(
 			altTitle = null,
 			state = null,
-			tags = doc.select("div.serie-infos li:contains(Categorias:) a").mapNotNullToSet { a ->
+			tags = doc.select("div.serie-infos li:contains(Categorias:) a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LerManga.kt

@@ -103,9 +103,9 @@ internal class LerManga(context: MangaLoaderContext) : PagedMangaParser(context,
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml().requireElementById("menu-header")
-		return doc.select("#menu-item:contains(GÊNERO) ul li a").mapNotNullToSet { a ->
+		return doc.select("#menu-item:contains(GÊNERO) ul li a").mapToSet { a ->
 			MangaTag(
-				key = a.attr("href").removeSuffix("/").substringAfterLast("/"),
+				key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 				title = a.text(),
 				source = source,
 			)
@@ -117,9 +117,9 @@ internal class LerManga(context: MangaLoaderContext) : PagedMangaParser(context,
 		val dateFormat = SimpleDateFormat("dd-MM-yyyy", sourceLocale)
 		return manga.copy(
 			description = doc.selectFirstOrThrow("div.boxAnimeSobreLast p").html(),
-			tags = doc.selectFirst("ul.genre-list")?.select("li a")?.mapNotNullToSet { a ->
+			tags = doc.selectFirst("ul.genre-list")?.select("li a")?.mapToSet { a ->
 				MangaTag(
-					key = a.attr("href").removeSuffix("/").substringAfterLast("/"),
+					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text(),
 					source = source,
 				)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LerMangaOnline.kt

@@ -92,7 +92,7 @@ internal class LerMangaOnline(context: MangaLoaderContext) :
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/").parseHtml().requireElementById("sub-menu")
-		return doc.select("ul.container li a").mapNotNullToSet { a ->
+		return doc.select("ul.container li a").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").removePrefix("/"),
 				title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/MangaOnline.kt

@@ -84,7 +84,7 @@ internal class MangaOnline(context: MangaLoaderContext) : PagedMangaParser(conte
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/generos/").parseHtml()
-		return doc.select(".wp-content p a").mapNotNullToSet { a ->
+		return doc.select(".wp-content p a").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").removeSuffix("/").substringAfterLast("/", ""),
 				title = a.text(),
@@ -98,7 +98,7 @@ internal class MangaOnline(context: MangaLoaderContext) : PagedMangaParser(conte
 		val dateFormat = SimpleDateFormat("dd/MM/yyyy", Locale.ROOT)
 		return manga.copy(
 			description = doc.selectLast(".data p")?.html(),
-			tags = doc.selectFirst(".sgeneros")?.select("a")?.mapNotNullToSet { a ->
+			tags = doc.selectFirst(".sgeneros")?.select("a")?.mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast("/", ""),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/MuitoHentai.kt

@@ -79,7 +79,7 @@ internal class MuitoHentai(context: MangaLoaderContext) : PagedMangaParser(conte
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/generos-dos-mangas/").parseHtml()
-		return doc.select("div.content a.profileSideBar").mapNotNullToSet { a ->
+		return doc.select("div.content a.profileSideBar").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").removeSuffix("/").substringAfterLast("/"),
 				title = a.text(),
@@ -92,7 +92,7 @@ internal class MuitoHentai(context: MangaLoaderContext) : PagedMangaParser(conte
 		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).parseHtml()
 		return manga.copy(
 			description = doc.selectFirstOrThrow(".backgroundpost:contains(Sinopse)").html(),
-			tags = doc.select("a.genero_btn").mapNotNullToSet { a ->
+			tags = doc.select("a.genero_btn").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast("/"),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt

@@ -493,7 +493,7 @@ internal abstract class GroupleParser(
 				?: throw ParseException("Genres filter element not found", url)
 		val result = MutableScatterMap<String, String>(properties.size)
 		properties.forEach { li ->
-			val name = li.text().trim().lowercase()
+			val name = li.text().lowercase()
 			val id = li.selectFirstOrThrow("input").id()
 			result[name] = id
 		}

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/multichan/YaoiChanParser.kt

@@ -33,7 +33,7 @@ internal class YaoiChanParser(context: MangaLoaderContext) : ChanParser(context,
 				val href = a.attrAsRelativeUrl("href")
 				MangaChapter(
 					id = generateUid(href),
-					name = a.text().trim(),
+					name = a.text(),
 					number = i + 1f,
 					volume = 0,
 					url = href,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/sinmh/SinmhParser.kt

@@ -125,7 +125,7 @@ internal abstract class SinmhParser(
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
-		return doc.select(".filter-item:contains(按剧情) li a:not(.active)").mapNotNullToSet { a ->
+		return doc.select(".filter-item:contains(按剧情) li a:not(.active)").mapToSet { a ->
 			val href = a.attr("href").removeSuffix('/').substringAfterLast('/')
 			MangaTag(
 				key = href,
@@ -152,7 +152,7 @@ internal abstract class SinmhParser(
 			}
 		}
 		manga.copy(
-			tags = doc.body().select(selectGenre).mapNotNullToSet { a ->
+			tags = doc.body().select(selectGenre).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/tr/TrWebtoon.kt

@@ -150,7 +150,7 @@ internal class TrWebtoon(context: MangaLoaderContext) :
 		val tags =
 			webClient.httpGet("https://$domain/webtoon-listesi").parseHtml().requireElementById("collapseExample")
 				.select(".pt-12 a").drop(1)
-		return tags.mapNotNullToSet { a ->
+		return tags.mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").substringAfterLast("genre=").substringBefore("&sort"),
 				title = a.text(),
@@ -162,7 +162,7 @@ internal class TrWebtoon(context: MangaLoaderContext) :
 	override suspend fun getDetails(manga: Manga): Manga {
 		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).parseHtml()
 		return manga.copy(
-			tags = doc.body().select("li.movie__year a").mapNotNullToSet { a ->
+			tags = doc.body().select("li.movie__year a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast('='),
 					title = a.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/BlogTruyenParser.kt

@@ -120,7 +120,7 @@ internal class BlogTruyenParser(context: MangaLoaderContext) :
 
 		val tagMap = availableTags().associateBy { it.title }
 		val tags = descriptionElement.select("p > span.category").mapNotNullToSet {
-			val tagName = it.selectFirst("a")?.text()?.trim() ?: return@mapNotNullToSet null
+			val tagName = it.selectFirst("a")?.textOrNull() ?: return@mapNotNullToSet null
 			tagMap[tagName]
 		}
 

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/BlogTruyenVN.kt

@@ -135,8 +135,8 @@ internal class BlogTruyenVN(context: MangaLoaderContext) :
 		val tagItems = doc.select("li[data-id]")
 		val tagMap = ArrayMap<String, MangaTag>(tagItems.size)
 		for (tag in tagItems) {
-			val title = tag.text().trim()
-			tagMap[tag.text().trim()] = MangaTag(
+			val title = tag.text()
+			tagMap[title] = MangaTag(
 				title = title,
 				key = tag.attr("data-id"),
 				source = source,
@@ -173,7 +173,7 @@ internal class BlogTruyenVN(context: MangaLoaderContext) :
 
 		val tags = cacheTags.getOrNull()?.let { tagMap ->
 			descriptionElement.select("p > span.category").mapNotNullToSet {
-				val tagName = it.selectFirst("a")?.text()?.trim() ?: return@mapNotNullToSet null
+				val tagName = it.selectFirst("a")?.textOrNull() ?: return@mapNotNullToSet null
 				tagMap[tagName]
 			}
 		}

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/HentaiVNParser.kt

@@ -122,8 +122,8 @@ internal class HentaiVNParser(context: MangaLoaderContext) : MangaParser(context
 				}
 			},
 			rating = docs.selectFirst("div.page_like")?.let {
-				val like = it.selectFirst("div.but_like")?.text()?.trim()?.toIntOrNull() ?: return@let null
-				val dislike = it.selectFirst("div.but_unlike")?.text()?.trim()?.toIntOrNull() ?: return@let null
+				val like = it.selectFirst("div.but_like")?.text()?.toIntOrNull() ?: return@let null
+				val dislike = it.selectFirst("div.but_unlike")?.text()?.toIntOrNull() ?: return@let null
 				when {
 					like == 0 && dislike == 0 -> RATING_UNKNOWN
 					else -> like.toFloat() / (like + dislike)

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/TruyenQQ.kt

@@ -4,8 +4,8 @@ import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaSourceParser
 import org.koitharu.kotatsu.parsers.PagedMangaParser
 import org.koitharu.kotatsu.parsers.config.ConfigKey
-import org.koitharu.kotatsu.parsers.network.UserAgents
 import org.koitharu.kotatsu.parsers.model.*
+import org.koitharu.kotatsu.parsers.network.UserAgents
 import org.koitharu.kotatsu.parsers.util.*
 import java.text.SimpleDateFormat
 import java.util.*
@@ -146,7 +146,7 @@ internal class TruyenQQ(context: MangaLoaderContext) : PagedMangaParser(context,
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/tim-kiem-nang-cao.html").parseHtml()
-		return doc.select(".advsearch-form div.genre-item").mapNotNullToSet {
+		return doc.select(".advsearch-form div.genre-item").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow("span").attr("data-id"),
 				title = it.text(),
@@ -160,7 +160,7 @@ internal class TruyenQQ(context: MangaLoaderContext) : PagedMangaParser(context,
 		val dateFormat = SimpleDateFormat("dd/MM/yyyy", Locale.ENGLISH)
 		return manga.copy(
 			altTitle = doc.selectFirst("h2.other-name")?.text(),
-			tags = doc.select("ul.list01 li").mapNotNullToSet {
+			tags = doc.select("ul.list01 li").mapToSet {
 				val key = it.attr("href").substringAfterLast("-").substringBeforeLast(".")
 				MangaTag(
 					key = key,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vmp/VmpParser.kt

@@ -98,7 +98,7 @@ internal abstract class VmpParser(
 
 	private suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/$listUrl").parseHtml()
-		return doc.select("div.tagcloud a").mapNotNullToSet { a ->
+		return doc.select("div.tagcloud a").mapToSet { a ->
 			MangaTag(
 				key = a.attr("href").removeSuffix("/").substringAfterLast(geneUrl, ""),
 				title = a.text().toTitleCase(),
@@ -112,7 +112,7 @@ internal abstract class VmpParser(
 		val doc = webClient.httpGet(fullUrl).parseHtml()
 
 		manga.copy(
-			tags = doc.select("div.tax_box div.links ul:not(.post-categories) li a").mapNotNullToSet { a ->
+			tags = doc.select("div.tax_box div.links ul:not(.post-categories) li a").mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix("/").substringAfterLast(geneUrl, ""),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/wpcomics/en/XoxoComics.kt

@@ -130,7 +130,7 @@ internal class XoxoComics(context: MangaLoaderContext) :
 		}
 		val aut = doc.body().select(selectAut).text()
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/ZeistMangaParser.kt

@@ -185,7 +185,7 @@ internal abstract class ZeistMangaParser(
 
 	protected open suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.selectFirstOrThrow("div.filter").select("ul li").mapNotNullToSet {
+		return doc.selectFirstOrThrow("div.filter").select("ul li").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow("input").attr("value"),
 				title = it.selectFirstOrThrow("label").text().toTitleCase(sourceLocale),
@@ -225,7 +225,7 @@ internal abstract class ZeistMangaParser(
 		val chaptersDeferred = async { loadChapters(manga.url, doc) }
 		manga.copy(
 			author = author?.text(),
-			tags = doc.select(selectTags).mapNotNullToSet { a ->
+			tags = doc.select(selectTags).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").substringAfterLast("label/").substringBefore("?"),
 					title = a.text().toTitleCase(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/ar/MangaAiLand.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.requireElementById
 
@@ -19,7 +19,7 @@ internal class MangaAiLand(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("LinkList1").select("ul li a").mapNotNullToSet {
+		return doc.requireElementById("LinkList1").select("ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").substringBefore("?").substringAfterLast('/'),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/ar/MangaHub.kt

@@ -23,7 +23,7 @@ internal class MangaHub(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("Genre").select("div.items-center").mapNotNullToSet {
+		return doc.requireElementById("Genre").select("div.items-center").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow("input").attr("value"),
 				title = it.selectFirstOrThrow("label").text().substringBefore(')').toTitleCase(sourceLocale),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/id/KlManhua.kt

@@ -7,7 +7,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.requireElementById
 
@@ -17,7 +17,7 @@ internal class KlManhua(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("LinkList1").select("ul li a").mapNotNullToSet {
+		return doc.requireElementById("LinkList1").select("ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").substringBefore("?").substringAfterLast('/'),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/id/Mikoroku.kt

@@ -14,7 +14,7 @@ internal class Mikoroku(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("Genre").select("div.items-center").mapNotNullToSet {
+		return doc.requireElementById("Genre").select("div.items-center").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow("input").attr("value"),
 				title = it.selectFirstOrThrow("label").text().substringBefore('('),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/id/ShiyuraSub.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 
 @MangaSourceParser("SHIYURASUB", "ShiyuraSub", "id")
@@ -17,7 +17,7 @@ internal class ShiyuraSub(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.select("div.list-label-widget-content ul li a").mapNotNullToSet {
+		return doc.select("div.list-label-widget-content ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").removeSuffix("/").substringAfterLast('/'),
 				title = it.html().substringBefore("<span"),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/id/ToonCubus.kt

@@ -16,7 +16,7 @@ internal class ToonCubus(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/p/genre-list.html").parseHtml()
-		return doc.select(".dzdes-genre ul li a").mapNotNullToSet {
+		return doc.select(".dzdes-genre ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").removeSuffix("/").substringAfterLast("/"),
 				title = it.selectFirstOrThrow("span").text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/pt/AnimeXNovel.kt

@@ -19,7 +19,7 @@ internal class AnimeXNovel(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("LinkList1").select("ul li a").mapNotNullToSet {
+		return doc.requireElementById("LinkList1").select("ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").removeSuffix("/").substringAfterLast('/'),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/pt/GuildaTierDraw.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.requireElementById
 
@@ -16,7 +16,7 @@ internal class GuildaTierDraw(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("LinkList2").select("ul li a").mapNotNullToSet {
+		return doc.requireElementById("LinkList2").select("ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").substringBefore("?").substringAfterLast('/'),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/tr/EpikMan.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.requireElementById
 
@@ -19,7 +19,7 @@ internal class EpikMan(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain").parseHtml()
-		return doc.requireElementById("LinkList1").select("ul li a").mapNotNullToSet {
+		return doc.requireElementById("LinkList1").select("ul li a").mapToSet {
 			MangaTag(
 				key = it.attr("href").substringBefore("?").substringAfterLast('/'),
 				title = it.text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/tr/Mikrokosmosfb.kt

@@ -7,7 +7,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.selectFirstOrThrow
 
@@ -22,7 +22,7 @@ internal class Mikrokosmosfb(context: MangaLoaderContext) :
 		val doc = webClient.httpGet("https://$domain").parseHtml()
 		val tags = doc.selectFirstOrThrow("script:containsData(label: )").data()
 			.substringAfter("label: [").substringBefore("]").replace("\"", "").split(", ")
-		return tags.mapNotNullToSet {
+		return tags.mapToSet {
 			MangaTag(
 				key = it,
 				title = it,

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zeistmanga/tr/SnscoeurTurkey.kt

@@ -7,7 +7,7 @@ import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.site.zeistmanga.ZeistMangaParser
 import org.koitharu.kotatsu.parsers.util.domain
-import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.selectFirstOrThrow
 
@@ -22,7 +22,7 @@ internal class SnscoeurTurkey(context: MangaLoaderContext) :
 
 	override suspend fun fetchAvailableTags(): Set<MangaTag> {
 		val doc = webClient.httpGet("https://$domain/p/gelismis-arama.html").parseHtml()
-		return doc.selectFirstOrThrow("div.filter").select("ul li").mapNotNullToSet {
+		return doc.selectFirstOrThrow("div.filter").select("ul li").mapToSet {
 			MangaTag(
 				key = it.selectFirstOrThrow("input").attr("value"),
 				title = it.selectFirstOrThrow("label").text(),

src/main/kotlin/org/koitharu/kotatsu/parsers/site/zmanga/ZMangaParser.kt

@@ -168,7 +168,7 @@ internal abstract class ZMangaParser(
 				altTitle = null,
 				rating = div.selectFirstOrThrow("div.info div.score").ownText().toFloatOrNull()?.div(10f)
 					?: RATING_UNKNOWN,
-				tags = doc.body().select("div.genres a").mapNotNullToSet { span ->
+				tags = doc.body().select("div.genres a").mapToSet { span ->
 					MangaTag(
 						key = span.attr("class"),
 						title = span.text().toTitleCase(),
@@ -225,7 +225,7 @@ internal abstract class ZMangaParser(
 		val aut = doc.body().select(selectAut).text()
 
 		manga.copy(
-			tags = doc.body().select(selectTag).mapNotNullToSet { a ->
+			tags = doc.body().select(selectTag).mapToSet { a ->
 				MangaTag(
 					key = a.attr("href").removeSuffix('/').substringAfterLast('/'),
 					title = a.text().toTitleCase().replace(",", ""),

src/main/kotlin/org/koitharu/kotatsu/parsers/util/Collection.kt

@@ -27,7 +27,7 @@ public inline fun <T, R> Collection<T>.mapToSet(transform: (T) -> R): Set<R> {
 	return mapTo(ArraySet(size), transform)
 }
 
-public inline fun <T, R> Collection<T>.mapNotNullToSet(transform: (T) -> R?): Set<R> {
+public inline fun <T, R : Any> Collection<T>.mapNotNullToSet(transform: (T) -> R?): Set<R> {
 	val destination = ArraySet<R>(size)
 	for (item in this) {
 		destination.add(transform(item) ?: continue)