tests/readlink.py

revset-limit: use boolean testing instead of `len(revs) < 1`

I'm not sure why we wrote it that way. But smartsets have faster/lazier non-zero
testing than length computation.

#!/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)