[bugfix] Fix doc error introduced in cca2d26a97f5
[bugfix] Fix doc error introduced in cca2d26a97f5

Bug: T187009
Change-Id: I0d94c01400ed6705b0e77b80c0e1df648e12d5a6

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core