Fixed: Parsing of some poorly named standard episode release names

Closes #1522

src/NzbDrone.Core.Test/ParserTests/SingleEpisodeParserFixture.cs

@@ -123,6 +123,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Red Dwarf - S02 - E06 - Parallel Universe", "Red Dwarf", 2, 6)]
         [TestCase("O.J.Simpson.Made.in.America.Part.Two.720p.HDTV.x264-2HD", "O J Simpson Made in America", 1, 2)]
         [TestCase("The.100000.Dollar.Pyramid.2016.S01E05.720p.HDTV.x264-W4F", "The 100000 Dollar Pyramid 2016", 1, 5)]
+        [TestCase("Class S01E02 (22 October 2016) HDTV 720p [Webrip]", "Class", 1, 2)]
         //[TestCase("", "", 0, 0)]
         public void should_parse_single_episode(string postTitle, string title, int seasonNumber, int episodeNumber)
         {

src/NzbDrone.Core/Parser/Parser.cs

@@ -55,7 +55,7 @@ namespace NzbDrone.Core.Parser
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 //Anime - Title Season EpisodeNumber + Absolute Episode Number [SubGroup]
-                new Regex(@"^(?<title>.+?)(?:[-_\W](?<![()\[!]))+(?:S?(?<season>(?<!\d+)\d{1,2}(?!\d+))(?:(?:[ex]|\W[ex]){1,2}(?<episode>\d{2}(?!\d+)))+).+?(?:[-_. ]?(?<absoluteepisode>\d{3}(?!\d+)))+.+?\[(?<subgroup>.+?)\](?:$|\.mkv)",
+                new Regex(@"^(?<title>.+?)(?:[-_\W](?<![()\[!]))+(?:S?(?<season>(?<!\d+)\d{1,2}(?!\d+))(?:(?:[ex]|\W[ex]){1,2}(?<episode>(?<!\d+)\d{2}(?!\d+)))+).+?(?:[-_. ]?(?<absoluteepisode>(?<!\d+)\d{3}(?!\d+)))+.+?\[(?<subgroup>.+?)\](?:$|\.mkv)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 //Anime - Title Absolute Episode Number [SubGroup]