Fix typos in comments and documentation (#2608)

* Fix typos in comments and documentations

* Fixes more typo

test/Discord.Net.Analyzers.Tests/Helpers/DiagnosticVerifier.Helper.cs

@@ -33,7 +33,7 @@ namespace TestHelper
         #region  Get Diagnostics
 
         /// <summary>
-        /// Given classes in the form of strings, their language, and an IDiagnosticAnlayzer to apply to it, return the diagnostics found in the string after converting it to a document.
+        /// Given classes in the form of strings, their language, and an IDiagnosticAnalyzer to apply to it, return the diagnostics found in the string after converting it to a document.
         /// </summary>
         /// <param name="sources">Classes in the form of strings.</param>
         /// <param name="language">The language the source classes are in.</param>
@@ -203,4 +203,3 @@ namespace TestHelper
         }
     }
 }
-

test/Discord.Net.Tests.Unit/EmbedBuilderTests.cs

@@ -171,7 +171,7 @@ namespace Discord
         }
 
         /// <summary>
-        ///     Tests that valid url's do not throw any exceptions.
+        ///     Tests that valid url does not throw any exceptions.
         /// </summary>
         /// <param name="url">The url to set.</param>
         [Theory]