Last modified: 2011-04-14 15:12:17 UTC
Currently {{#if:{{Special:PrefixIndex/Foo/}}|yes|no}} will *always* return "yes", even if the page [[Foo]] does not have any subpages. Looking at the HTML, it seems that it includes a <br/> when there is no target list; it should return an empty string.
*** Bug 22434 has been marked as a duplicate of this bug. ***