Document metadata like :orphan: is rendered as text if the ReST file is included.

[Paebbels]

I have a include file called Authors.rst, which is included into another document. The file is not referenced by a toctree directive. To suppress the "not referenced" warning, I added the metadata :orphan: to the Authors.rst file. Unfortunately, the text orphan: is displayed in the HTML output. (Not there is no leading colon in the text.)

Authors.rst:

:orphan:

.. # This file is included. So it needs to be marked as orphan to suppress warnings.

Some content

index.rst:

List of Contributers
********************

.. include:: ./Authors.rst

Rendered HTML output:

---

Related issues: #3149

[tk0miya]

You should not mark :orphan: for included files.
At current release, Sphinx does not warn for included files as orphaned.
So please remove them and upgrade your sphinx (if still warned).