Red:Red Extra unit test to push us into counting words properly
Green: Counting unique (identical) words in a sentence
Feature:Red Let's look at punctuation
Refactor: Bring out FindWords method so we can test it
Red:Refactor move to a yield return so I have opportunity to change the returned words
Red:Red Add new unit test with speech marks
Red:Green Speech marks just stripped
Red:Green handle splitting on commas (without spaces)
Red:Green handle comma followed by space