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

[Andrew Cagney]

New commits:
commit de529484ce391ec0ac1e638a5f4f792ec54f796e
Author: Andrew Cagney <cagney at gnu.org>
Date:   Thu May 30 22:25:57 2019 -0400

    jambuf: add jam_char() and jambuf_pos(), test