tests/readlink.py

subrepo: use safehasattr instead of hasattr

Some of these instances could be rewritten as clever getattr(x, y,
default) ladders, but that felt like it impeded readability too much
to be worth the modest efficiency gain.

#!/usr/bin/env python

import errno, os, sys

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

sys.exit(0)