templater: handle SyntaxError when parsing ui.logtemplate
Before, Mercurial would crash with a traceback ending with
SyntaxError: unmatched quotes
if you configured
[ui]
logtemplate = {rev}\n
The SyntaxError is now catched and the string is re-parsed without
requiring quotes.
$ 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