[Orgmode] org-babel-tangle tangles too much !

[Nicolas Girard]

Hi,
I can't get tangle to work the way I want.
Given a file f.org which contains

=====
#+srcname: a
#+begin_src emacs-lisp
(a)
#+end_src

#+srcname: b
#+begin_src emacs-lisp
<<a>>
(b)
#+end_src
=====

I would like (a) to appear only once in the tangled file f.el.
All I could get is, that either (a) appears twice (default behaviour),
or (a) doesn't appear at all when I append ":tangle no" to #+srcname:
a.

Any thoughts ?

-- 
Nicolas