tests/test-gendoc-da.t

tests: fix regex in test-subrepo-git.t to match entire string

Due to a bug in the test runner (fixed by the next commit), the regex
used for matching lines like " foobar | 2 +-" stoppped at the "|" and
the test passed even though the rest of the line did not match. The
test seems to have been supposed to match "|" and "+" literally on
those lines, so this changes the regex to escape those characters. It
also changes a "\s*" to "\s+" since I think we'll always include a
space after the "|" in the diffstat output.

Differential Revision: https://phab.mercurial-scm.org/D1545

#require docutils gettext

  $ $TESTDIR/check-gendoc da
  checking for parse errors