Fix #11231, (append|prepend|before|after) w/ array of jQuery objects.

Closes gh-666, thanks to @rkatic!

src/manipulation.js

@@ -289,6 +289,10 @@ jQuery.fn.extend({
 	},
 
 	domManip: function( args, table, callback ) {
+
+		// Flatten any nested arrays
+		args = [].concat.apply( [], args );
+
 		var results, first, fragment, iNoClone,
 			i = 0,
 			value = args[0],

test/unit/manipulation.js

@@ -324,6 +324,12 @@ var testAppendForObject = function(valueObj, isFragment) {
 	obj.append(valueObj( 5 ));
 	ok( obj.text().match( /5$/ ), "Check for appending a number" + objType );
 
+	QUnit.reset();
+	expected = "This link has class=\"blog\": Simon Willison's WeblogTry them out:GoogleYahoo";
+	obj = getObj();
+	obj.append( valueObj( [ jQuery("#first"), jQuery("#yahoo, #google") ] ) );
+	equal( obj.text(), expected, "Check for appending of array of jQuery objects" );
+
 	QUnit.reset();
 	obj = getObj();
 	obj.append(valueObj( " text with spaces " ));
@@ -355,7 +361,7 @@ var testAppendForObject = function(valueObj, isFragment) {
 }
 
 var testAppend = function(valueObj) {
-	expect(56);
+	expect(58);
 	testAppendForObject(valueObj, false);
 	testAppendForObject(valueObj, true);
 
@@ -743,7 +749,7 @@ test("appendTo(String|Element|Array<Element>|jQuery)", function() {
 });
 
 var testPrepend = function(val) {
-	expect(5);
+	expect(6);
 	var defaultText = "Try them out:"
 	var result = jQuery("#first").prepend(val( "<b>buga</b>" ));
 	equal( result.text(), "buga" + defaultText, "Check if text prepending works" );
@@ -763,6 +769,11 @@ var testPrepend = function(val) {
 	expected = "YahooTry them out:This link has class=\"blog\": Simon Willison's Weblog";
 	jQuery("#sap").prepend(val( jQuery("#yahoo, #first") ));
 	equal( jQuery("#sap").text(), expected, "Check for prepending of jQuery object" );
+
+	QUnit.reset();
+	expected = "Try them out:GoogleYahooThis link has class=\"blog\": Simon Willison's Weblog";
+	jQuery("#sap").prepend( val( [ jQuery("#first"), jQuery("#yahoo, #google") ] ) );
+	equal( jQuery("#sap").text(), expected, "Check for prepending of array of jQuery objects" );
 };
 
 test("prepend(String|Element|Array&lt;Element&gt;|jQuery)", function() {
@@ -854,7 +865,7 @@ test("prependTo(String|Element|Array&lt;Element&gt;|jQuery)", function() {
 });
 
 var testBefore = function(val) {
-	expect(6);
+	expect(7);
 	var expected = "This is a normal link: bugaYahoo";
 	jQuery("#yahoo").before(val( "<b>buga</b>" ));
 	equal( jQuery("#en").text(), expected, "Insert String before" );
@@ -874,6 +885,11 @@ var testBefore = function(val) {
 	jQuery("#yahoo").before(val( jQuery("#mark, #first") ));
 	equal( jQuery("#en").text(), expected, "Insert jQuery before" );
 
+	QUnit.reset();
+	expected = "This is a normal link: Try them out:GooglediveintomarkYahoo";
+	jQuery("#yahoo").before( val( [ jQuery("#first"), jQuery("#mark, #google") ] ) );
+	equal( jQuery("#en").text(), expected, "Insert array of jQuery objects before" );
+
 	var set = jQuery("<div/>").before("<span>test</span>");
 	equal( set[0].nodeName.toLowerCase(), "span", "Insert the element before the disconnected node." );
 	equal( set.length, 2, "Insert the element before the disconnected node." );
@@ -918,7 +934,7 @@ test("insertBefore(String|Element|Array&lt;Element&gt;|jQuery)", function() {
 });
 
 var testAfter = function(val) {
-	expect(6);
+	expect(7);
 	var expected = "This is a normal link: Yahoobuga";
 	jQuery("#yahoo").after(val( "<b>buga</b>" ));
 	equal( jQuery("#en").text(), expected, "Insert String after" );
@@ -938,6 +954,11 @@ var testAfter = function(val) {
 	jQuery("#yahoo").after(val( jQuery("#mark, #first") ));
 	equal( jQuery("#en").text(), expected, "Insert jQuery after" );
 
+	QUnit.reset();
+	expected = "This is a normal link: YahooTry them out:Googlediveintomark";
+	jQuery("#yahoo").after( val( [ jQuery("#first"), jQuery("#mark, #google") ] ) );
+	equal( jQuery("#en").text(), expected, "Insert array of jQuery objects after" );
+
 	var set = jQuery("<div/>").after("<span>test</span>");
 	equal( set[1].nodeName.toLowerCase(), "span", "Insert the element after the disconnected node." );
 	equal( set.length, 2, "Insert the element after the disconnected node." );