tests/readlink.py

pager: add tests

We've never had tests for pager, and I want to start experimenting
with ways to clean up the implementation and make it a bit more
graceful.

#!/usr/bin/env python

import errno, os, 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, 'not a symlink'

sys.exit(0)