Correcting RFC-822 compliance for authors mails (comma separated)

setup.py

@@ -152,9 +152,9 @@ def setup_package():
           url="https://gitlab.lis-lab.fr/dev/scikit-splearn.git",
           license='new BSD',
           author='François Denis and Rémi Eyraud and Denis Arrivault and Dominique Benielli',
-          author_email='francois.denis@lis-lab.fr ' +
-                       'remi.eyraud@lis-lab.fr ' +
-                       'denis.arrivault@lis-lab.fr ' +
+          author_email='francois.denis@lis-lab.fr, ' +
+                       'remi.eyraud@lis-lab.fr, ' +
+                       'denis.arrivault@lis-lab.fr, ' +
                        'dominique.benielli@univ-amu.fr ',
           cmdclass={'clean': m_clean, 'sdist': m_sdist},
           classifiers=['Development Status :: 5 - Production/Stable',