chore(subParsers/images): fix jshint error
chore(subParsers/images): fix jshint error

Quick fix for jshint error that was preventing Travis to test the lib properly
stevemao/showdown,pazof/showdown,snegovick/showdown,digideskio/showdown,yaniswang/showdown,xinshitn/showdown,xinshitn/showdown,digideskio/showdown,axter/showdown,alazyer/showdown,alazyer/showdown,showdownjs/showdown,coolroad/showdown,snegovick/showdown,pazof/showdown,phw/showdown,showdownjs/showdown,stevemao/showdown,webutilz/showdown,bsnizek/showdown,bsansouci/showdown,yaniswang/showdown,phw/showdown,OMGgogong/showdown,NichenLg/showdown,bsansouci/showdown,OMGgogong/showdown,twitwi/showdown,bsnizek/showdown,juanonsoftware/showdown,juanonsoftware/showdown,axter/showdown,webutilz/showdown,NichenLg/showdown,twitwi/showdown,coolroad/showdown