Below is the generated HTML for with line numbers and without line numbers, respectively. ```html <!-- Without line numbers --> <pre class="sourceCode scala"> <code class="sourceCode scala"> <span class="kw">trait</span> Monad[M[_]] </code> </pre> <!-- With line numbers --> <table class="sourceCode scala numberLines"> <tr class="sourceCode"> <td class="lineNumbers"> <pre>1</pre> </td> <td class="sourceCode"> <pre> <code class="sourceCode scala"> <span class="kw">trait</span> Monad[M[_]] </code> </pre> </td> </tr> </table> ``` The markdown used is: ``` ~~~~ { .scala } trait Monad[M[_]] ~~~~ ~~~~ { .scala .numberLines} trait Monad[M[_]] ~~~~ ``` Notice that without line numbers the outer `pre` has a `sourceCode` class whereas with line numbers the `sourceCode` class is only put in `code` and table-related tags. In the original `syntax.css` file synax highlighting was only triggered if the `kw` and friends tags were within a `pre.sourceCode` - that means it did not trigger with line numbers. This change removes the requirement for the `pre` prefix so that highlighting is triggered with or without line numbers, so long as the code is within *some* `.sourceCode` tag.