openstack-manuals/doc/contributor-guide/source/rst-conv/comment.rst

Comments

Indicate a comment by means of the .. marker.

Input

.. This is a comment. It is not visible in the documentation build.
   Generally, use it to include TODO within the content followed
   by the initials of the person who is to perform the action.

For example:

.. TODO(OG): add a link to the Decorations section when it is available.