fill-paragraph in comments results in mess

[Barry Warsaw]

In Emacs 24.2, r1151 lp:python-mode (6.0.13), fill-paragraph (M-q) in a comment region results in a mess.

-----snip snip-----
def update():
    # We need to get a reliable checksum for the dictionary in
    # newpkg_list. Dictionary order is unpredictable, so to get a
    # reproducible checksum, we get the items of the dict, sort on the
    # keys, then get the json representation of this sorted list, encode
    # this to bytes assuming utf-8, and hash
    # the resulting bytes.
-----snip snip-----

Put point at the beginning of one of the lines in the comment, say bol of "# keys".

Hit M-q (i.e. fill-paragraph)

This is the result:

-----snip snip-----
def update(): # We need to get a reliable checksum for the dictionary in #
newpkg_list. Dictionary order is unpredictable, so to get a # reproducible
checksum, we get the items of the dict, sort on the # keys, then get the json
representation of this sorted list, encode # this to bytes assuming utf-8, and
hash # the resulting bytes.
-----snip snip-----