webtoons.com: add chapter number to name (#10425)

* webtoons.com: add chapter number to name

closes https://github.com/keiyoushi/extensions-source/issues/9963

* remove unused

* Update src/all/webtoons/src/eu/kanade/tachiyomi/extension/all/webtoons/Webtoons.kt

---------

Co-authored-by: stevenyomi <95685115+stevenyomi@users.noreply.github.com>

src/all/webtoons/build.gradle

@@ -1,7 +1,7 @@
 ext {
     extName = 'Webtoons.com'
     extClass = '.WebtoonsFactory'
-    extVersionCode = 50
+    extVersionCode = 51
     isNsfw = false
 }
 

src/all/webtoons/src/eu/kanade/tachiyomi/extension/all/webtoons/Webtoons.kt

@@ -27,6 +27,7 @@ import org.jsoup.nodes.Element
 import org.jsoup.parser.Parser
 import rx.Observable
 import java.net.SocketException
+import java.text.DecimalFormat
 import java.util.Calendar
 
 open class Webtoons(
@@ -331,12 +332,16 @@ open class Webtoons(
             }
         }
 
+        val numberFormatter = DecimalFormat("#.##")
         return chapters.map { episode ->
             SChapter.create().apply {
                 url = episode.viewerLink
-                name = Parser.unescapeEntities(episode.episodeTitle, false)
-                if (episode.hasBgm) {
-                    name += " ♫"
+                name = buildString {
+                    append(Parser.unescapeEntities(episode.episodeTitle, false))
+                    append(" (ch. ", numberFormatter.format(episode.chapterNumber), ")")
+                    if (episode.hasBgm) {
+                        append(" ♫")
+                    }
                 }
                 date_upload = episode.exposureDateMillis
                 chapter_number = episode.chapterNumber