Regression in r51797, anon signature links where prefixed with contributions/ because...

diff --git a/includes/parser/Parser.php b/includes/parser/Parser.php
index 3b93067..a5e721d 100644 (file)
--- a/includes/parser/Parser.php
+++ b/includes/parser/Parser.php
@@ -3812,7 +3812,7 @@ class Parser
 
                $username = $user->getName();
                $nickname = $user->getOption( 'nickname' );
-               $nickname = $nickname === '' ? $username : $nickname;
+               $nickname = $nickname === null ? $username : $nickname;
 
                if( mb_strlen( $nickname ) > $wgMaxSigChars ) {
                        $nickname = $username;