Fixed: Duplicate multi-episode style with trailing brackets

Only dashes, underscores, periods and spaces will be considered separators

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderFixture.cs

@@ -628,5 +628,16 @@ namespace NzbDrone.Core.Test.OrganizerTests
             Subject.BuildFileName(new List<Episode> { _episode1 }, _series, _episodeFile)
                    .Should().Be(String.Empty);
         }
+
+        [Test]
+        public void should_get_proper_filename_when_multi_episode_is_duplicated_and_bracket_follows_pattern()
+        {
+            _namingConfig.StandardEpisodeFormat =
+                "{Series Title} - S{season:00}E{episode:00} - ({Quality Title}, {MediaInfo Full}, {Release Group}) - {Episode Title}";
+            _namingConfig.MultiEpisodeStyle = (int) MultiEpisodeStyle.Duplicate;
+
+            Subject.BuildFileName(new List<Episode> { _episode1, _episode2 }, _series, _episodeFile)
+                   .Should().Be("South Park - S15E06 - S15E07 - (HDTV-720p, , DRONE) - City Sushi");
+        }
     }
 }

src/NzbDrone.Core/Organizer/FileNameBuilder.cs

@@ -42,15 +42,15 @@ namespace NzbDrone.Core.Organizer
         private static readonly Regex AbsoluteEpisodeRegex = new Regex(@"(?<absolute>\{absolute(?:\:0+)?})",
                                                                RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        public static readonly Regex SeasonEpisodePatternRegex = new Regex(@"(?<separator>(?<=}).+?)?(?<seasonEpisode>s?{season(?:\:0+)?}(?<episodeSeparator>e|x)(?<episode>{episode(?:\:0+)?}))(?<separator>.+?(?={))?",
+        public static readonly Regex SeasonEpisodePatternRegex = new Regex(@"(?<separator>(?<=})[- ._]+?)?(?<seasonEpisode>s?{season(?:\:0+)?}(?<episodeSeparator>e|x)(?<episode>{episode(?:\:0+)?}))(?<separator>[- ._]+?(?={))?",
                                                                             RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        public static readonly Regex AbsoluteEpisodePatternRegex = new Regex(@"(?<separator>(?<=}).+?)?(?<absolute>{absolute(?:\:0+)?})(?<separator>.+?(?={))?",
+        public static readonly Regex AbsoluteEpisodePatternRegex = new Regex(@"(?<separator>(?<=})[- ._]+?)?(?<absolute>{absolute(?:\:0+)?})(?<separator>[- ._]+?(?={))?",
                                                                     RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         public static readonly Regex AirDateRegex = new Regex(@"\{Air(\s|\W|_)Date\}", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        public static readonly Regex SeriesTitleRegex = new Regex(@"(?<token>\{(?:Series)(?<separator>\s|\.|-|_)(Clean)?Title\})",
+        public static readonly Regex SeriesTitleRegex = new Regex(@"(?<token>\{(?:Series)(?<separator>[- ._])(Clean)?Title\})",
                                                                             RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex FileNameCleanupRegex = new Regex(@"\.{2,}", RegexOptions.Compiled);