Note:

If you want to create a new page for developers, you should create it on the Moodle Developer Resource site.

Moodle 2.1 release notes/New question engine: Revision history

From MoodleDocs

Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

21 June 2011