Use Contains(char) instead of Contains(string) for performance

.editorconfig

@@ -194,7 +194,6 @@ dotnet_diagnostic.CA1819.severity = suggestion
 dotnet_diagnostic.CA1822.severity = suggestion
 dotnet_diagnostic.CA1823.severity = suggestion
 dotnet_diagnostic.CA1824.severity = suggestion
-dotnet_diagnostic.CA1847.severity = suggestion
 dotnet_diagnostic.CA2000.severity = suggestion
 dotnet_diagnostic.CA2002.severity = suggestion
 dotnet_diagnostic.CA2007.severity = suggestion

src/NzbDrone.Common/Extensions/StringExtensions.cs

@@ -131,7 +131,7 @@ namespace NzbDrone.Common.Extensions
 
         public static string WrapInQuotes(this string text)
         {
-            if (!text.Contains(" "))
+            if (!text.Contains(' '))
             {
                 return text;
             }
@@ -240,7 +240,7 @@ namespace NzbDrone.Common.Extensions
 
         public static string ToUrlHost(this string input)
         {
-            return input.Contains(":") ? $"[{input}]" : input;
+            return input.Contains(':') ? $"[{input}]" : input;
         }
     }
 }

src/NzbDrone.Core/Datastore/Migration/163_mediainfo_to_ffmpeg.cs

@@ -627,13 +627,13 @@ namespace NzbDrone.Core.Datastore.Migration
 
             try
             {
-                if (audioChannelPositions.Contains("+"))
+                if (audioChannelPositions.Contains('+'))
                 {
                     return audioChannelPositions.Split('+')
                         .Sum(s => decimal.Parse(s.Trim(), CultureInfo.InvariantCulture));
                 }
 
-                if (audioChannelPositions.Contains("/"))
+                if (audioChannelPositions.Contains('/'))
                 {
                     var channelStringList = Regex.Replace(audioChannelPositions,
                             @"^\d+\sobjects",

src/NzbDrone.Core/Localization/LocalizationService.cs

@@ -133,7 +133,7 @@ namespace NzbDrone.Core.Localization
 
             await CopyInto(dictionary, baseFilenamePath).ConfigureAwait(false);
 
-            if (culture.Contains("_"))
+            if (culture.Contains('_'))
             {
                 var languageBaseFilenamePath = Path.Combine(prefix, GetResourceFilename(culture.Split('_')[0]));
                 await CopyInto(dictionary, languageBaseFilenamePath).ConfigureAwait(false);

src/NzbDrone.Core/Parser/SceneChecker.cs

@@ -6,12 +6,12 @@
         // It's better not to use a title that might be scene than to use one that isn't scene
         public static bool IsSceneTitle(string title)
         {
-            if (!title.Contains("."))
+            if (!title.Contains('.'))
             {
                 return false;
             }
 
-            if (title.Contains(" "))
+            if (title.Contains(' '))
             {
                 return false;
             }

src/Sonarr.Http/Frontend/Mappers/IndexHtmlMapper.cs

@@ -35,7 +35,7 @@ namespace Sonarr.Http.Frontend.Mappers
 
             return !resourceUrl.StartsWith("/content") &&
                    !resourceUrl.StartsWith("/mediacover") &&
-                   !resourceUrl.Contains(".") &&
+                   !resourceUrl.Contains('.') &&
                    !resourceUrl.StartsWith("/login");
         }
     }