Add flake8-tuple
Add flake8-tuple

Detects `x = a,` requiring that construct is `x = (a, )`

Change-Id: I7c5133fef51c768369488319349290cac994d596

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