Don't suggest changes to punctuation

It's unhelpful to make suggestions that are the same but without punctuation.
We currently do this, for example:
  * how? => how
  * comma, word => comma word

It's also nice to retain the user's punctuation where possible.
Remove commented out code
Merge pull request #118 from alphagov/dont_suggest_removing_punctuation

Don't suggest changes to punctuation