Last modified: 2013-06-14 12:56:42 UTC
See https://www.mediawiki.org/w/index.php?title=Extension%3ASyntax_Highlighting&diff=711181&oldid=706834 - this was an attempt to change the word "returns" to "return". I have absolutely no idea what happened; all I know is it shouldn't.
*** This bug has been marked as a duplicate of bug 49577 ***