[Swan-commit] Changes to ref refs/heads/master

[D. Hugh Redelmeier]

New commits:
commit 12fe36f80cc88276ba68af5cee0438ff0b17b245
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Tue Dec 5 17:18:11 2017 -0500

    pluto: use booleans as booleans