From e0809209ecc6cf76c342919c8fde7ef7124354cc Mon Sep 17 00:00:00 2001
From: Gabriel Wicke <gwicke@wikimedia.org>
Date: Mon, 4 Jun 2012 12:26:03 +0200
Subject: [PATCH] Don't set the data-mw attribute if the object is actually
 empty.

Change-Id: I984f1b44bba67d7a9f1a709738d14c0ee02f69a9
---
 .../parser/mediawiki.HTML5TreeBuilder.node.js    | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/modules/parser/mediawiki.HTML5TreeBuilder.node.js b/modules/parser/mediawiki.HTML5TreeBuilder.node.js
index a82bd94497..97ff63cccc 100644
--- a/modules/parser/mediawiki.HTML5TreeBuilder.node.js
+++ b/modules/parser/mediawiki.HTML5TreeBuilder.node.js
@@ -74,15 +74,15 @@ FauxHTML5.TreeBuilder.prototype._att = function (maybeAttribs) {
 FauxHTML5.TreeBuilder.prototype.processToken = function (token) {
 	var attribs = token.attribs || [];
 	if ( token.dataAttribs ) {
-		if ( ! token.attribs ) {
-			token.attribs = [];
+		var dataMW = JSON.stringify( token.dataAttribs );
+		if ( dataMW !== '{}' ) {
+			attribs = attribs.concat([ 
+					{
+						// Mediawiki-specific round-trip / non-semantic information
+						k: 'data-mw', 
+						v: dataMW
+					} ] );
 		}
-		attribs = attribs.concat([ 
-				{
-					// Mediawiki-specific round-trip / non-semantic information
-					k: 'data-mw', 
-					v: JSON.stringify( token.dataAttribs ) 
-				} ] );
 	}
 
 	switch( token.constructor ) {