Ability to check for common typos (e.g., manger)

[ajeanmahoney]

These sorts of typos are ones that a spell checker would miss: mange instead of manage, complaint instead of compliant, etc.

The user should be able to step through each instance of a common typo and be allowed to edit it or move to the next instance.

This functionality is currently provided by the typos script, which also looks for text that is formatted normatively but is not actually a normative key word (e.g., RECOMMENDS).