fix(styles/school-book): don't style all the pre, use .hljs instead (#2034)
fix(styles/school-book): don't style all the pre, use .hljs instead (#2034)


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