Sphinx autodoc creates warnings
After running autodoc, sphinx has a warning, which our docs process causes to be an error
10:21:01 AM: reading sources... [ 33%] coala_utils
10:21:01 AM: reading sources... [ 66%] coala_utils.string_processing
10:21:02 AM: reading sources... [100%] index
10:21:02 AM: Warning, treated as error:
10:21:02 AM: /opt/build/repo/coala_utils/string_processing/__init__.py:docstring of coala_utils.string_processing.Match:0:duplicate object description of coala_utils.string_processing.Match, other instance in /opt/build/repo/docs/coala_utils.string_processing.rst, use :noindex: for one of them
10:21:02 AM: make: *** [html] Error 1
10:21:02 AM: make: Leaving directory `/opt/build/repo/docs'