Ticket #47329: 47329.diff

src/wp-admin/css/common.css

@@ -3774 +3774 @@
 
         code {
                 word-wrap: break-word;
+                word-wrap: anywhere; /* Firefox. Allow breaking long words anywhere */
+                word-break: break-word; /* Webkit: Treated similarly to word-wrap: break-word */
         }
 
         /* General Metabox */