Run spell check over solution

OpenRA.Test/OpenRA.Game/MiniYamlTest.cs

@@ -272,7 +272,7 @@ Parent: # comment without value
 			Assert.AreEqual(yaml, result);
 		}
 
-		[TestCase(TestName = "Comments should be be removed when discardCommentsAndWhitespace is false")]
+		[TestCase(TestName = "Comments should be removed when discardCommentsAndWhitespace is false")]
 		public void CommentsShouldntSurviveRoundTrip()
 		{
 			var yaml = @"

OpenRA.Test/OpenRA.Game/VariableExpressionTest.cs

@@ -354,7 +354,7 @@ namespace OpenRA.Test
 			AssertParseFailure("t -1", "Missing binary operation before `-1` at index 2");
 		}
 
-		[TestCase(TestName = "Test mixed charaters at end of identifier parser errors")]
+		[TestCase(TestName = "Test mixed characters at end of identifier parser errors")]
 		public void TestParseMixedEndErrors()
 		{
 			AssertParseFailure("t- 1", "Invalid identifier end character at index 1 for `t-`");