[DOC] Add doc strings to methods
[DOC] Add doc strings to methods

Change-Id: Ic28b614b5cd7fb4d484f5352469fdbb838115951

smalyshev/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core,magul/pywikibot-core,hasteur/g13bot_tools_new,jayvdb/pywikibot-core,jayvdb/pywikibot-core,happy5214/pywikibot-core,PersianWikipedia/pywikibot-core,magul/pywikibot-core,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core,npdoty/pywikibot,darthbhyrava/pywikibot-local,h4ck3rm1k3/pywikibot-core,Darkdadaah/pywikibot-core,Darkdadaah/pywikibot-core,npdoty/pywikibot,happy5214/pywikibot-core