Fixed up a regression for a unique filename pattern (c79x1) which was getting caught in the scene name regex. (Fixes #4898)

Author: majora2007

Kavita.Services.Tests/Parsing/MangaParsingTests.cs

@@ -520,6 +520,7 @@ public void ParseSeriesTest(string filename, string expected)
     // "31" is part of the series title ("The Long Summer of August 31"), not a chapter number.
     [InlineData("The Long Summer of August 31 Vol. 1.cbz", Parser.DefaultChapter)]
     [InlineData("BTOOOM! v03 (2013) (Digital) (c1fi7) (ED).cbz", Parser.DefaultChapter)]
+    [InlineData("Series - c079x1 (2025) - Creator's Note.cbz", "79")]
     public void ParseChaptersTest(string filename, string expected)
     {
         Assert.Equal(expected, Parser.ParseChapter(filename, LibraryType.Manga));

Kavita.Services/Scanner/Parser.cs

@@ -631,7 +631,7 @@ public static partial class Parser
         // Trailing (?(Range)|(?![a-zA-Z])) keeps this from matching inside ripper/scanlator tags like "(c1fi7)"
         // (a bare short number glued to more letters) while still allowing ranges like c001-006x1.
         new Regex(
-            @"(\b|_)(c|ch)(\.?\s?)(?<Chapter>(\d+(\.\d)?)(?<Range>-c?\d+(\.\d)?)?)(?(Range)|(?![a-zA-Z]))",
+            @"(\b|_)(c|ch)(\.?\s?)(?<Chapter>(?>\d+(\.\d)?)(?<Range>-c?\d+(\.\d)?)?)(?(Range)|(?:x\d+)?(?![a-zA-Z]))",
             MatchOptions, RegexTimeout),
         // [Suihei Kiki]_Kasumi_Otoko_no_Ko_[Taruby]_v1.1.zip
         new Regex(