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

[D. Hugh Redelmeier]

New commits:
commit ba33726a2a9dd44c9e34929c5aac35b40f2f5446
Author: D. Hugh Redelmeier <hugh at mimosa.com>
Date:   Mon Apr 26 22:07:50 2021 -0400

    C code: restore some tabs that had decayed into spaces