Ticket #20587: 20587.3.diff

wp-includes/css/editor.css

@@ -2033 +2033 @@
         border-width: 1px;
         border-top-left-radius: 0;
         border-top-right-radius: 3px;
-        border-bottom-right-left: 0;
+        border-bottom-left-radius: 0;
         border-bottom-right-radius: 3px;
 }