Edit: fix link regex, titles cannot have [] (x-tools#581)

Bug: T408332

Author: agoujot

src/Model/Edit.php

@@ -381,7 +381,7 @@ public static function wikifyString(
 
         $linkMatch = null;
 
-        while (preg_match_all("/\[\[:?(.*?)]]/", $summary, $linkMatch)) {
+        while (preg_match_all("/\[\[:?([^\[\]]*?)]]/", $summary, $linkMatch)) {
             $wikiLinkParts = explode('|', $linkMatch[1][0]);
             $wikiLinkPath = htmlspecialchars($wikiLinkParts[0]);
             $wikiLinkText = htmlspecialchars(