More specific notice if api_number is None
More specific notice if api_number is None

If not -total option is given, api_number is None.
Print a more specific message while retrieving moved pages.

Change-Id: I4b72771a35824cce23d87eb7add3e82505dd2258

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