tests: use [(] instead of \( to avoid warning on py3...
tests: use [(] instead of \( to avoid warning on py3
From a recent test run of mine:
run-tests.py:1633: DeprecationWarning: invalid escape sequence '\('
This lets us encode the expectation without the badness.
Differential Revision:
https://phab.mercurial-scm.org/D3621
