- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Modules/Searches/Services/FeedsService.cs

@@ -130,7 +130,7 @@ public class FeedsService : INService
 
                         embed.WithTitle(title.TrimTo(256));
 
-                        var desc = feedItem.Description?.StripHTML();
+                        var desc = feedItem.Description?.StripHtml();
                         if (!string.IsNullOrWhiteSpace(feedItem.Description))
                             embed.WithDescription(desc.TrimTo(2048));
 
@@ -167,7 +167,7 @@ public class FeedsService : INService
 
     public bool AddFeed(ulong guildId, ulong channelId, string rssFeed)
     {
-        rssFeed.ThrowIfNull(nameof(rssFeed));
+        ArgumentNullException.ThrowIfNull(rssFeed, nameof(rssFeed));
 
         var fs = new FeedSub()
         {

src/NadekoBot/Modules/Searches/Services/SearchesService.cs

@@ -163,13 +163,12 @@ public class SearchesService : INService
     }
 
     public Task<((string Address, DateTime Time, string TimeZoneName), TimeErrors?)> GetTimeDataAsync(string arg)
-    {
-        return GetTimeDataFactory(arg);
-        //return _cache.GetOrAddCachedDataAsync($"nadeko_time_{arg}",
-        //    GetTimeDataFactory,
-        //    arg,
-        //    TimeSpan.FromMinutes(1));
-    }
+        => GetTimeDataFactory(arg);
+
+    //return _cache.GetOrAddCachedDataAsync($"nadeko_time_{arg}",
+    //    GetTimeDataFactory,
+    //    arg,
+    //    TimeSpan.FromMinutes(1));
     private async Task<((string Address, DateTime Time, string TimeZoneName), TimeErrors?)> GetTimeDataFactory(string query)
     {
         query = query.Trim();

src/NadekoBot/Modules/Searches/Services/StreamNotificationService.cs

@@ -3,7 +3,6 @@ using NadekoBot.Modules.Searches.Common;
 using NadekoBot.Modules.Searches.Common.StreamNotifications;
 using NadekoBot.Services.Database.Models;
 using StackExchange.Redis;
-using NadekoBot.Common.Collections;
 using NadekoBot.Db;
 using NadekoBot.Db.Models;
 
@@ -477,9 +476,7 @@ public sealed class StreamNotificationService : INService
     }
 
     public Task<StreamData> GetStreamDataAsync(string url)
-    {
-        return _streamTracker.GetStreamDataByUrlAsync(url);
-    }
+        => _streamTracker.GetStreamDataByUrlAsync(url);
 
     private HashSet<FollowedStream> GetLocalGuildStreams(in StreamDataKey key, ulong guildId)
     {