[IMPR] prohibit positional arguments with Page.title()
[IMPR] prohibit positional arguments with Page.title()

It is not usefull to use Page.title() with positional arguments.
Prohibit this by new Python 3.5 functionality and force explicit
usage of parameters

Change-Id: Id6a0911c4a21702d19f8837a8da090a020dbbb70

wikimedia/pywikibot-core,wikimedia/pywikibot-core