Added extra "=" to make overcome underline and overline mismatch
while running python3 setup.py build_sphinx, i got this.
=============================================== Mailman - The GNU Mailing List Management System
/home/saurav/Downloads/openSource/mailman/build/lib/mailman/docs/NEWS.rst:123: WARNING: Inline interpreted text or phrase reference start-string without end-string. /home/saurav/Downloads/openSource/mailman/src/mailman/app/docs/moderator.rst:5: WARNING: duplicate label app-moderator, other instance in /home/saurav/Downloads/openSource/mailman/build/lib/mailman/app/docs/moderator.rst /home/saurav/Downloads/openSource/mailman/src/mailman/docs/NEWS.rst:1: SEVERE: Title overline & underline mismatch.