Revert "Manipulation: don't auto-insert tbody"

This reverts commit e984d1c.

Fixes jquerygh-2861

Author: timmywil

src/manipulation.js

@@ -38,14 +38,14 @@ var
 	rscriptTypeMasked = /^true\/(.*)/,
 	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g;
 
+// Manipulating tables requires a tbody
 function manipulationTarget( elem, content ) {
-	if ( jQuery.nodeName( elem, "table" ) &&
-		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ) {
+	return jQuery.nodeName( elem, "table" ) &&
+		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ?
 
-		return elem.getElementsByTagName( "tbody" )[ 0 ] || elem;
-	}
-
-	return elem;
+		elem.getElementsByTagName( "tbody" )[ 0 ] ||
+			elem.appendChild( elem.ownerDocument.createElement( "tbody" ) ) :
+		elem;
 }
 
 // Replace/restore the type attribute of script elements for safe DOM manipulation