Fixed: Error splitting subtitle from book title

Fixes #1473
Fixes READARR-39N
Fixes READARR-3ES
Fixes READARR-6CM

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

@@ -280,6 +280,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Andrew Steele", "Ageless: The New Science of Getting Older Without Getting Old", "Ageless", "The New Science of Getting Older Without Getting Old")]
         [TestCase("Author", "Title (Subtitle with spaces)", "Title", "Subtitle with spaces")]
         [TestCase("Author", "Title (Unabridged)", "Title (Unabridged)", "")]
+        [TestCase("Author", "asdf)(", "asdf)(", "")]
         public void should_split_title_correctly(string author, string book, string expectedTitle, string expectedSubtitle)
         {
             var (title, subtitle) = book.SplitBookTitle(author);

src/NzbDrone.Core/Parser/Parser.cs

@@ -413,7 +413,7 @@ namespace NzbDrone.Core.Parser
             return null;
         }
 
-        private static string GetTitleFuzzy(string report, string name, out string remainder)
+        public static string GetTitleFuzzy(string report, string name, out string remainder)
         {
             remainder = report;
 
@@ -600,8 +600,8 @@ namespace NzbDrone.Core.Parser
 
             if (parenthesis > -1)
             {
-                var endParenthesis = book.IndexOf(')');
-                if (endParenthesis > -1 && !book.Substring(parenthesis + 1, endParenthesis - parenthesis).Contains(' '))
+                var endParenthesis = book.IndexOf(')', parenthesis);
+                if (endParenthesis == -1 || !book.Substring(parenthesis + 1, endParenthesis - parenthesis).Contains(' '))
                 {
                     parenthesis = -1;
                 }