[[!comment format=mdwn
 username="joey"
 subject="""comment 4"""
 date="2016-04-04T20:01:42Z"
 content="""
@Don, when a preferred content expression matches
based on the name of a file, it will only match objects used by
files currently in the tree, and not objects used by old versions.

So, what you want is probably as simple as "include=*"
"""]]