Fix custom Sphinx formatter for aliased functions
Fix custom Sphinx formatter for aliased functions

Regression of @99bcf20: Since Sphinx 1.2.1 (commit
sphinx-doc/sphinx@574a796), sphinx.ext.autosummary overwrites custom-set
documenters.
This is not a particularly elegant solution, but none of the events from
sphinx.ext.autodoc allows editing a function's name. Subclassing other
autodoc classes also appears to be quite challenging.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt