tests/readlink.py

tests: prevent printing \r to stdout

Like we've done in other recent commits, we need to change
sys.stdout on Python 3 to not use os.linesep so output is
consistent on Python 3 on Windows.

With this change, test-notify.t now passes on Python 3 on Windows!

Differential Revision: https://phab.mercurial-scm.org/D8342

#!/usr/bin/env python

from __future__ import absolute_import, print_function

import errno
import os
import sys

for f in sys.argv[1:]:
    try:
        print(f, '->', os.readlink(f))
    except OSError as err:
        if err.errno != errno.EINVAL:
            raise
        print(f, '->', f, 'not a symlink')

sys.exit(0)