highlights text with the CSS class name 'hilight' by default: it now uses the
CSS class name 'highlight' instead. The function's 'hilighter' keyword
argument has also been deprecated, use 'highlighter' instead.
+* Upgraded markdown from 1.5 to 1.6a.
* Sync'd Prototype helper to 6057.
* Sync'd Urls helper to 6070.
* Sync'd Text helper to 6096.