windows: replace single quote with double quote when translating to cmd.exe
Since cmd.exe doesn't understand single quotes, single quotes to prevent $var
expansion is basically unusable without this. Single quote isn't allowed in a
path name, so it seems unlikely to come up otherwise.
$ 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