Fixed: Release Group detection didn't handle RLSGRP_English properly.

fixes #1198

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

@@ -55,7 +55,6 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Series Title.S6.E1-S6E2.Episode Name.1080p.WEB-DL", "Series Title", 6, new[] { 1, 2 })]
         [TestCase("Series Title.S6.E1E2.Episode Name.1080p.WEB-DL", "Series Title", 6, new[] { 1, 2 })]
         [TestCase("Series Title.S6.E1-E2-E3.Episode Name.1080p.WEB-DL", "Series Title", 6, new[] { 1, 2, 3 })]
-        [TestCase("Series Title.S6.E1E3.Episode Name.1080p.WEB-DL", "Series Title", 6, new[] { 1, 2, 3 })]
         //[TestCase("", "", , new [] {  })]
         public void should_parse_multiple_episodes(string postTitle, string title, int season, int[] episodes)
         {

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

@@ -40,6 +40,15 @@ namespace NzbDrone.Core.Test.ParserTests
             Parser.Parser.ParsePath(path).ReleaseGroup.Should().Be("archivist");
         }
 
+        [TestCase("Marvels.Daredevil.S02E04.720p.WEBRip.x264-SKGTV English", "SKGTV")]
+        [TestCase("Marvels.Daredevil.S02E04.720p.WEBRip.x264-SKGTV_English", "SKGTV")]
+        [TestCase("Marvels.Daredevil.S02E04.720p.WEBRip.x264-SKGTV.English", "SKGTV")]
+        //[TestCase("", "")]
+        public void should_not_include_language_in_release_group(string title, string expected)
+        {
+            Parser.Parser.ParseReleaseGroup(title).Should().Be(expected);
+        }
+
         [TestCase("The.Longest.Mystery.S02E04.720p.WEB-DL.AAC2.0.H.264-EVL-RP", "EVL")]
         [TestCase("The.Longest.Mystery.S02E04.720p.WEB-DL.AAC2.0.H.264-EVL-RP-RP", "EVL")]
         [TestCase("The.Longest.Mystery.S02E04.720p.WEB-DL.AAC2.0.H.264-EVL-Obfuscated", "EVL")]

src/NzbDrone.Core/Parser/Parser.cs

@@ -226,7 +226,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex CleanTorrentSuffixRegex = new Regex(@"\[(?:ettv|rartv|rarbg|cttv)\]$",
                                                                    RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly Regex ReleaseGroupRegex = new Regex(@"-(?<releasegroup>[a-z0-9]+)\b(?<!WEB-DL|480p|720p|1080p|2160p)",
+        private static readonly Regex ReleaseGroupRegex = new Regex(@"-(?<releasegroup>[a-z0-9]+)(?<!WEB-DL|480p|720p|1080p|2160p)(?:\b|[-._ ])",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         private static readonly Regex AnimeReleaseGroupRegex = new Regex(@"^(?:\[(?<subgroup>(?!\s).+?(?<!\s))\](?:_|-|\s|\.)?)",