sigpipe-remote: display more information about the non-py3 python
If we are running the wrong things, it is useful to know which wrong thing we
are running.
Differential Revision: https://phab.mercurial-scm.org/D11079
$ 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