Fixed setup.py again

Author: aaltat

setup.py

@@ -11,7 +11,7 @@
 License :: OSI Approved :: Apache Software License
 Operating System :: OS Independent
 Programming Language :: Python :: 2
-'Programming Language :: Python :: 2.7
+Programming Language :: Python :: 2.7
 Programming Language :: Python :: 3
 Programming Language :: Python :: 3.6
 Programming Language :: Python :: 3.7