Add \csimplemacro to parallel the csimplemacrodesc environment. Fix a typo in the comments for csimplemacrodesc.
Add \csimplemacro to parallel the csimplemacrodesc environment.
Fix a typo in the comments for csimplemacrodesc.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator