Fix setup.py classifiers

Author: rshipp

setup.py

@@ -48,9 +48,9 @@
         'Intended Audience :: System Administrators',
         'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 3.6'
-        'Programming Language :: Python :: 3.7'
-        'Programming Language :: Python :: 3 :: Only'
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3 :: Only',
         'Topic :: Security',
         'Topic :: Internet',
     ],