templatefilters: drop broken "jsonescape" from filters table (BC)
It's been unused, undocumented and flawed in that it expects a unicode input,
never works correctly if an input has non-ascii character. We should use "json"
filter instead.
$ hg init
$ touch unknown
$ touch a
$ hg add a
$ hg ci -m "1"
$ touch b
$ hg add b
$ hg ci -m "2"
Should show unknown
$ hg status
? unknown
$ hg revert -r 0 --all
removing b
Should show unknown and b removed
$ hg status
R b
? unknown
Should show a and unknown
$ ls
a
unknown