Added ReplaceAtTests.cs for the ReplaceAt extension method. Added some explicit exception handling to ListUtil.cs. Updated some failing unit tests now that the plurality call has been removed.
Finished fixes for BadThingsTests.cs.
Fixed EventualAdverbTests.cs.
Fixed FaukonTests.cs.
Fixed SentenceTests.cs.
Fixed PersonVerbEndingTests.cs. Note there are spacing fixes needed here.
Fixed up the asserts in PersonVerbEndingTests.cs. Added spacing in GetPersonVerbHavingBadThingComplement.
Fixed up more unit tests. Assert.IsTrue should be replaced with Assert.AreEqual now.