context: use field names instead of field numbers on scmutil.status
As part of my pytype adventures I want to make scmutil.status no longer a
subclass of tuple. This is part of that process.
Differential Revision: https://phab.mercurial-scm.org/D7399
from __future__ import absolute_import, print_function
import re
import sys
print(re.sub(r"(?<=Message-Id:) \n ", " ", sys.stdin.read()), end="")