[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2016-05-27T17:06:41Z"
 content="""
Non-alphanumerics are stripped.

This also results in a file "foo.ba________________________r" having
".bar" picked as its extension.

I think the fix is to filter out over-long "extensions" before stripping
the non-alphanumerics.
"""]]