fix for does_text_contain_section: - re.escape() before substituting blank/underscor with regex - remove escaping blanks
fix for does_text_contain_section:
- re.escape() before substituting blank/underscor with regex
- remove escaping blanks

https://mediawiki.org/wiki/Special:Code/pywikipedia/11755

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