Last modified: 2013-06-08 06:45:51 UTC
See: https://en.wikipedia.org/w/api.php?action=query&prop=revisions&titles=Module:Sandbox&rvprop=content&rvexpandtemplates&rvgeneratexml&format=jsonfm https://en.wikipedia.org/w/api.php?action=query&prop=revisions&titles=Module:Sandbox&rvprop=content&format=jsonfm https://en.wikipedia.org/w/api.php?action=query&prop=revisions&titles=Module:Sandbox&rvprop=content&rvexpandtemplates&rvgeneratexml&format=xmlfm https://en.wikipedia.org/w/api.php?action=query&prop=revisions&titles=Module:Sandbox&rvprop=content&format=xmlfm
Also: https://en.wikipedia.org/w/api.php?action=query&prop=revisions&titles=A&rvlimit=10&rvprop=&format=jsonfm - an error is not required to trigger it.
*** This bug has been marked as a duplicate of bug 10887 ***