Do not repeat xmlns in attributes on parsing

iq.go

@@ -166,7 +166,13 @@ type Node struct {
 }
 
 func (n *Node) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
-	n.Attrs = start.Attr
+	// Assign	"n.Attrs = start.Attr", without repeating xmlns in attributes
+	for _, attr := range start.Attr {
+		// Do not repeat xmlns
+		if attr.Name.Local != "xmlns" {
+			n.Attrs = append(n.Attrs, attr)
+		}
+	}
 	type node Node
 	return d.DecodeElement((*node)(n), &start)
 }

iq_test.go

@@ -37,6 +37,7 @@ func TestGenerateIq(t *testing.T) {
 		},
 		Nodes: []Node{
 			{XMLName: xml.Name{
+				Space: "http://jabber.org/protocol/disco#info",
 				Local: "identity",
 			},
 				Attrs: []xml.Attr{