Merge branch 'feature/upgrade_sphinx_and_breathe_v3.1' into 'release/v3.1'
authorJiang Jiang Jian <jack@espressif.com>
Tue, 5 Mar 2019 06:34:59 +0000 (14:34 +0800)
committerJiang Jiang Jian <jack@espressif.com>
Tue, 5 Mar 2019 06:34:59 +0000 (14:34 +0800)
docs: Preparation for upgrade of Sphinx and Breathe packages to versions 1.8.4…

See merge request idf/esp-idf!4381


Trivial merge