Subject: Re: bug#18716: 24.3; dired-omit-extensions's default value omits COPYING.LIB

From: Stefan Monnier <[email-masked]>
Date: Thu, 16 Oct 2014 09:15:42 -0400

>>> LGPL is used, it should be in a file called COPYING.LESSER. 
>> Duh!  ".LESSER" is also a completely silly extension.
> It's a name, not an extension.

Hmm... let's see

   M-: (file-name-extension "COPYING.LESSER") RET
=>
   "LESSER"

Nope, sorry.  And in case you'd argue that Elisp is biased in my favor:

   Python 2.7.7 (default, Jun  3 2014, 23:36:29) 
   [GCC 4.8.2] on linux2
   Type "help", "copyright", "credits" or "license" for more information.
   >>> import os
   >>> fileName, fileExtension = os.path.splitext('COPYING.LESSER')
   >>> fileExtension
   '.LESSER'

It looks like an extension to me, to Elisp, and to Python.  Feel free to
check with other tools.

        Stefan