Fixes regex for JS examples (#1591)
Fixes regex for JS examples (#1591)

This PR fixes a regex example which Prism does not highlight correctly
because it is preceded by a comment.
CupOfTea696/prism,PrismJS/prism,PrismJS/prism,PrismJS/prism,CupOfTea696/prism,PrismJS/prism,PrismJS/prism,CupOfTea696/prism,CupOfTea696/prism,CupOfTea696/prism