Editorial: Fix indentation of opening line of interface DataTransfer

Author: dbaron

source

@@ -74920,7 +74920,7 @@ body { display:none }
 
   <pre class="idl">[Exposed=Window,
  <span data-x="dom-DataTransfer">Constructor</span>]
-  interface <dfn>DataTransfer</dfn> {
+interface <dfn>DataTransfer</dfn> {
   attribute DOMString <span data-x="dom-DataTransfer-dropEffect">dropEffect</span>;
   attribute DOMString <span data-x="dom-DataTransfer-effectAllowed">effectAllowed</span>;