[NHentai] Fix search with exact tag (#4644)

* [NHentai] Fix language filter

* Update build.gradle

* Fix filter with exact search

* Fix code style

* Update build.gradle

* Update build.gradle

src/all/nhentai/src/eu/kanade/tachiyomi/extension/all/nhentai/NHentai.kt

@@ -166,27 +166,18 @@ open class NHentai(
         }
     }
 
-    private fun combineQuery(filters: FilterList): String {
-        val stringBuilder = StringBuilder()
-        val advSearch = filters.filterIsInstance<AdvSearchEntryFilter>().flatMap { filter ->
-            val splitState = filter.state.split(",").map(String::trim).filterNot(String::isBlank)
-            splitState.map {
-                AdvSearchEntry(filter.name, it.removePrefix("-"), it.startsWith("-"))
+    private fun combineQuery(filters: FilterList): String = buildString {
+        filters.filterIsInstance<AdvSearchEntryFilter>().forEach { filter ->
+            filter.state.split(",")
+                .map(String::trim)
+                .filterNot(String::isBlank)
+                .forEach { tag ->
+                    if (tag.startsWith("-")) append("-")
+                    append(filter.name, "\"", tag.removePrefix("-"), "\" ")
                 }
         }
-
-        advSearch.forEach { entry ->
-            if (entry.exclude) stringBuilder.append("-")
-            stringBuilder.append("${entry.name}:")
-            stringBuilder.append(entry.text)
-            stringBuilder.append(" ")
     }
 
-        return stringBuilder.toString()
-    }
-
-    data class AdvSearchEntry(val name: String, val text: String, val exclude: Boolean)
-
     private fun searchMangaByIdRequest(id: String) = GET("$baseUrl/g/$id", headers)
 
     private fun searchMangaByIdParse(response: Response, id: String): MangasPage {