debugmergestate: print out record type for files
We're going to add a separate record type for change/delete conflicts soon. We
need to make sure they get stored with the correct record type so that older
versions of Mercurial correctly abort when they see change/delete records.
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ echo 'base' > base
$ hg ci -Ambase
adding base
$ hg qnew -mmqbase mqbase
$ hg qsave
$ hg qrestore 2
restoring status: hg patches saved state