Show the file which raised the pywikibot.Error
Show the file which raised the pywikibot.Error

- For investigating the error, it helps to know the affected file page.
- New error message. The error occurs when an invalid or broken template
  was fetched.

Change-Id: I0b03a76d233fe664d067e668df781f1998f472ce

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