Landing pull request 403. Check for both camelized and hyphenated dat…

…a property names; Fixes #9301.

More Details:
 - #403
 - http://bugs.jquery.com/ticket/9301

src/data.js

@@ -108,7 +108,10 @@ jQuery.extend({
 			return thisCache[ internalKey ] && thisCache[ internalKey ].events;
 		}
 
-		return getByName ? thisCache[ jQuery.camelCase( name ) ] : thisCache;
+		return getByName ? 
+			// Check for both converted-to-camel and non-converted data property names
+			thisCache[ jQuery.camelCase( name ) ] || thisCache[ name ] :
+			thisCache;
 	},
 
 	removeData: function( elem, name, pvt /* Internal Use Only */ ) {

test/unit/data.js

@@ -508,3 +508,20 @@ test("jQuery.data should follow html5 specification regarding camel casing", fun
 
 	div.remove();
 });
+
+test("jQuery.data should not miss data with preset hyphenated property names", function() {
+
+	expect(2);
+
+	var div = jQuery("<div/>", { id: "hyphened" }).appendTo("#qunit-fixture"),
+		test = {
+			"camelBar": "camelBar",
+			"hyphen-foo": "hyphen-foo"
+		};
+
+	div.data( test );
+
+	jQuery.each( test , function(i, k) {
+		equal( div.data(k), k, "data with property '"+k+"' was correctly found");
+	});
+});