Format the project with 'dotnet format' (#2551)

* Sync and Re-Format

* Fix Title string.

* Fix indentation.

test/Discord.Net.Tests.Integration/DiscordRestApiClientTests.cs

@@ -1,4 +1,4 @@
-using Discord.API;
+using Discord.API;
 using Discord.API.Rest;
 using Discord.Net;
 using Discord.Rest;

test/Discord.Net.Tests.Integration/GuildTests.cs

@@ -76,7 +76,7 @@ namespace Discord
             await guild.ModifyAsync(x => { x.SystemChannel = new Optional<ITextChannel>(systemChannel); });
             Assert.Equal(systemChannel.Id, guild.SystemChannelId);
 
-            await Assert.ThrowsAsync<NullReferenceException>( async () =>
+            await Assert.ThrowsAsync<NullReferenceException>(async () =>
             {
                 await guild.ModifyAsync(x => x.SystemChannel = null);
             });
@@ -103,7 +103,7 @@ namespace Discord
             await guild.ModifyAsync(x => x.AfkChannel = new Optional<IVoiceChannel>(afkChannel));
             Assert.Equal(afkChannel.Id, guild.AFKChannelId);
 
-            await Assert.ThrowsAsync<NullReferenceException>( async () =>
+            await Assert.ThrowsAsync<NullReferenceException>(async () =>
             {
                 await guild.ModifyAsync(x => x.AfkChannel = null);
             });

test/Discord.Net.Tests.Integration/RestGuildFixture.cs

@@ -1,8 +1,8 @@
 using Discord.Rest;
 using System;
 using System.Collections.Generic;
-using System.Text;
 using System.Linq;
+using System.Text;
 
 namespace Discord
 {