Restore edit conflict detection
Restore edit conflict detection

Edit conflict detection was deactivated in 8ea28f6f.

Change-Id: I996d6b270ad8fab5d99696a76fb7102576bb6ca6

Darkdadaah/pywikibot-core,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,emijrp/pywikibot-core,Darkdadaah/pywikibot-core,wikimedia/pywikibot-core,jayvdb/pywikibot-core,happy5214/pywikibot-core,smalyshev/pywikibot-core,TridevGuha/pywikibot-core,icyflame/batman,happy5214/pywikibot-core,npdoty/pywikibot,h4ck3rm1k3/pywikibot-core,xZise/pywikibot-core,magul/pywikibot-core,darthbhyrava/pywikibot-local,npdoty/pywikibot,PersianWikipedia/pywikibot-core,magul/pywikibot-core,jayvdb/pywikibot-core,valhallasw/pywikibot-core,trishnaguha/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core,VcamX/pywikibot-core,hasteur/g13bot_tools_new