<p>PARIS -- French libraries are said to file their nation's constitutions -- there have been more than a dozen since 1789; the current one is a relatively ancient 49 years old -- under periodicals. Now Nicolas Sarkozy, France's peripatetic new president, has created a commission on constitutional reform. The commission includes Jack Lang who, as minister of culture in 1983 under President Francois Mitterrand, staged a sublimely unserious conference on the (supposed) world economic crisis, featuring the likes of Sophia Loren, Susan Sontag and Norman Mailer.</p>