(chore) fix test regex to be UTF-8 compatible
(chore) fix test regex to be UTF-8 compatible

isagalaev/highlight.js,highlightjs/highlight.js,carlokok/highlight.js,highlightjs/highlight.js,carlokok/highlight.js,highlightjs/highlight.js,isagalaev/highlight.js,carlokok/highlight.js,highlightjs/highlight.js,carlokok/highlight.js