优化

app/src/main/java/io/legado/app/data/entities/BookChapter.kt

@@ -66,7 +66,7 @@ data class BookChapter(
         val urlMatcher = AnalyzeUrl.paramPattern.matcher(url)
         val urlBefore = if(urlMatcher.find())url.substring(0,urlMatcher.start()) else url
         val urlAbsoluteBefore = NetworkUtils.getAbsoluteURL(baseUrl,urlBefore)
-        return if(urlBefore.length == url.length) urlAbsoluteBefore else urlAbsoluteBefore + url.substring(urlMatcher.end())
+        return if(urlBefore.length == url.length) urlAbsoluteBefore else urlAbsoluteBefore + ',' + url.substring(urlMatcher.end())
     }
 
     fun getFileName(): String = String.format("%05d-%s.nb", index, MD5Utils.md5Encode16(title))