templatefilters: make json filter be byte-transparent (BC) (
issue4926)
This is necessary to preserve filename encoding over JSON. Instead, this
patch inserts "|utf8" where non-ascii local-encoding texts can be passed
to "|json".
See also the commit that introduced "utf8" filter.
$ 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