Document extra argument for Python append().
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 547941b..adb7140 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -300,7 +300,7 @@
 
 opening/closing window causes other window with 'winfixheight' to change
 height.  Also happens when there is another window in the frame, if it's not
-very high. (Yegappan Lakshmanan, 2010 Jul 22)
+very high. (Yegappan Lakshmanan, 2010 Jul 22, Michael Peeters, 2010 Jul 22)
 
 Directory wrong in session file, caused by ":lcd" in BufEnter autocommand.
 (Felix Kater, 2009 Mar 3)