Pre-compile HTML-stripping regexes.
Pre-compile HTML-stripping regexes.

jakesyl/ruby-card,go38/anki,eduOS/anki,kenjhim/anki,weihautin/anki,weihautin/anki,abeyer/anki,hssm/anki,socialpercon/anki-1,sunclx/anki,xuewenfei/anki,hssm/anki,Stvad/anki,holycrepe/anki,LucasCabello/anki,jkitching/anki,subfusc/anki,Arthaey/anki,jakesyl/ruby-card,florianjacob/anki,ospalh/libanki3