Investigate monkey patch of PrismJS

This is the code for the highlight function from PrismJS:

```javascript
highlight: function (text, grammar, language) {
var env = {
code: text,
grammar: grammar,
language: language
};
_.hooks.run('before-tokenize', env);
if (!env.grammar) {
throw new Error('The language "' + env.language + '" has no grammar.');
}
env.tokens = _.tokenize(env.code, env.grammar);
_.hooks.run('after-tokenize', env);
return Token.stringify(_.util.encode(env.tokens), env.language);
},
```

There is a need to test with different grammars if those hooks make a difference. I was told they do.