use git config for username

Author: Pierrick Brun

UltiSnips/python.snippets

@@ -39,7 +39,7 @@ endsnippet
 snippet start
 # -*- coding: utf-8 -*-
 # Copyright 2019 Akretion (http://www.akretion.com).
-# @author Sébastien BEAU <sebastien.beau@akretion.com>
+# @author `git config user.name` <`git config user.email`>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 ${1}
 endsnippet