Fix off-by-one error in Tim's recent change to comment_region(): the list of lines returned by get_region() contains an empty line at the end representing the start of the next line, and this shouldn't be commented out!
Fix off-by-one error in Tim's recent change to comment_region(): the
list of lines returned by get_region() contains an empty line at the
end representing the start of the next line, and this shouldn't be
commented out!

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