It's probably related to the following error during documentation build:
WARNING: autodoc: failed to import module 'scripts.makecat'; the following exception was raised: Traceback (most recent call last): File "/src/.tox/doc/lib/python3.4/site-packages/sphinx/ext/autodoc/importer.py", line 152, in import_module __import__(modname) File "/src/scripts/makecat.py", line 265, in <module> answer = pywikibot.input(u"(Default is [[%s]]):" % workingcatname) File "/src/pywikibot/bot.py", line 468, in input data = ui.input(question, password=password, default=default, force=force) File "/src/pywikibot/userinterfaces/terminal_interface_base.py", line 293, in input text = self._input_reraise_cntl_c(password) File "/src/pywikibot/userinterfaces/terminal_interface_base.py", line 309, in _input_reraise_cntl_c text = self._raw_input() File "/src/pywikibot/userinterfaces/terminal_interface_base.py", line 248, in _raw_input return input() EOFError: EOF when reading a line