Added newline character as an escaped node

postfixNode.go

@@ -62,6 +62,9 @@ func newEscapedNode(c rune) postfixNode {
 	case 'b', 'B':
 		toReturn.nodetype = ASSERTION
 		toReturn.contents = append(toReturn.contents, c)
+	case 'n': // Newline character
+		toReturn.nodetype = CHARACTER
+		toReturn.contents = append(toReturn.contents, '\n')
 	default: // None of the above - append it as a regular character
 		toReturn.nodetype = CHARACTER
 		toReturn.contents = append(toReturn.contents, c)