Prior to T220447: Split out or remove Special:Contributions/newbies functionality, Special:Contributions could be used to view either the contributions of a single user/IP or those of "newbies". A radio label was used to select the functionality desired. Now that newbies is no longer an option, the label should be converted from Xml::radioLabel to just Xml::label. Since radioLabel is just a wrapper for a radio element followed by a label, the change is fairly simple.
Customize query in gerrit
|mediawiki/core||master||+2 -6||Special:Contributions - use `label` instead of `radioLabel` for username|