Bug 69455-pagegenerator filter grep can only be used once
Bug 69455-pagegenerator filter grep can only be used once

Multiple -grep:regxpr are now accepted by pagegenerator.

Change-Id: Ic0920511d44fbbc72212e397bf1888ab7cfa3901

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