When a comment almost exactly matches the range of an
accidental complex transclusion consisting only of
pages from the 'Template' namespace and wikitext fragments,
I think we can safely allow replying to the comment.
Even if this turns out to be incorrect in some cases,
the failure will be more graceful after the changes in T313100:
instead of potentially duplicating contents from a template,
the worst case now is that the reply will appear in the wrong
place (at the end of the transclusion).
Bug: T313093
Change-Id: Ie8da09d74a652d893fd8c3e2435ef6cb70fad64a
