Fix keyword formatting.

Kevin Deldycke · Kevin Deldycke · commit 5c2ca7d054aa · 2016-08-18T11:09:42.000+02:00
diff --git a/docs/yaml-config.rst b/docs/yaml-config.rst
@@ -152,7 +152,7 @@ python.extra_requirements
 
 List of `extra requirements`_ sections to install, additionnaly to the
 `package default dependencies`_. Only works if ``python.pip_install`` option
-above is set to `True`.
+above is set to ``True``.
 
 Let's say your Python package has a ``setup.py`` which looks like this:
 
