wikimedia/mediawiki-core — pull request #18 by leinaddm (2014-02-03 20:04:37+00:00)
Title: Bug 60759: add columns option to Special:PrefixIndex

Adds support for specifying the number of output columns to use in the
table generated by Special:PrefixIndex. Can be used as follows:

{{Special:PrefixIndex/{{FULLPAGENAME}}/|columns=2}}