I do not see percona_query_cache_with_comments_show.inc in PS 5.6.10 source code (checked .tar.gz), so probably does not apply to 5.6 (yet).
I do not see percona_ query_cache_ with_comments_ show.inc in PS 5.6.10 source code (checked .tar.gz), so probably does not apply to 5.6 (yet).