Attempted to fix #6227, not entirely sure if it's a problem as I'm having a...

Attempted to fix #6227, not entirely sure if it's a problem as I'm having a hard time reproducing it. Regardless, the change is harmless and potentially even speeds up appendTo, etc. slightly.

src/manipulation.js

@@ -442,7 +442,7 @@ jQuery.each({
 		} else {
 			for ( var i = 0, l = insert.length; i < l; i++ ) {
 				var elems = (i > 0 ? this.clone(true) : this).get();
-				jQuery.fn[ original ].apply( jQuery(insert[i]), elems );
+				jQuery.fn[ original ].call( jQuery(insert[i]), elems );
 				ret = ret.concat( elems );
 			}
 		

test/unit/manipulation.js

@@ -376,13 +376,21 @@ test("append(Function) with incoming value", function() {
 });
 
 test("appendTo(String|Element|Array<Element>|jQuery)", function() {
-	expect(14);
+	expect(16);
 
 	var defaultText = 'Try them out:'
 	jQuery('<b>buga</b>').appendTo('#first');
 	equals( jQuery("#first").text(), defaultText + 'buga', 'Check if text appending works' );
 	equals( jQuery('<option value="appendTest">Append Test</option>').appendTo('#select3').parent().find('option:last-child').attr('value'), 'appendTest', 'Appending html options to select element');
 
+	reset();
+	var l = jQuery("#first").children().length + 3;
+	jQuery("body").map(function(){
+		return jQuery("<strong></strong><b></b><b></b>").get();
+	}).appendTo("p");
+	equals( jQuery("#first").children().length, l, "Make sure the elements were inserted." );
+	equals( jQuery("#first").children().last()[0].nodeName.toLowerCase(), "b", "Verify the last element." );
+
 	reset();
 	var expected = "This link has class=\"blog\": Simon Willison's WeblogTry them out:";
 	jQuery(document.getElementById('first')).appendTo('#sap');