Create anonymous links

If in a page you have multiple links having the same label, for instance:

`docs <http//docs.com>`_
`docs <http//docs2.com>`_

You’ll see a warning in the logs stating Duplicate target name. To resolve the warning you can either

• change the link labels to be different, or

• create an anonymous link by adding two _ at the end of the link, for instance:

  `docs <http//docs2.com>`__