License Notice for ELPA packages

[Arash Esbati]

Hi all,

I'm about to update the license notice header for files distributed with
AUCTeX and wanted to ask if there is a preferred one for ELPA package.
I've seen several versions compared to this[1]:

• vertico.el says it is part of GNU Emacs, and then uses the license for
  small programs[2].

• pulsar.el says it is NOT part of GNU Emacs with the part for small
  programs[3].

• svg-lib.el is also NOT part of GNU Emacs, but uses a diffent last
  paragraph than in [1,4].

• pinentry.el says it is part of GNU Emacs, talks also about GNU Emacs
  in other places as well[5].

Where to go?

Best, Arash

Footnotes:
[1]  https://www.gnu.org/prep/maintain/html_node/License-Notices-for-Code.html
[2]  
https://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/vertico.el?h=externals/vertico
[3]  
https://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/pulsar.el?h=externals/pulsar
[4]  
https://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/svg-lib.el?h=externals/svg-lib
[5]  
https://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/pinentry.el?h=externals/pinentry