[migration/3.18] Only commit when we did something
Avoids countless confirmation prompts.
Closes #3438804.
.. -*- coding: utf-8 -*-
Writing text reports with RestructuredText
==========================================
|cubicweb| offers several text formats for the RichString type used in schemas,
including restructuredtext.
Three additional restructuredtext roles are defined by |cubicweb|:
.. autodocfunction:: cubicweb.ext.rest.eid_reference_role
.. autodocfunction:: cubicweb.ext.rest.rql_role
.. autodocfunction:: cubicweb.ext.rest.bookmark_role