Convert bad quotes to only single quote

tests/coverage_server.py

@@ -37,9 +37,9 @@ if __name__ == '__main__':
                 raise tornado.web.HTTPError(404)
 
     application = tornado.web.Application([
-        (r"/([a-zA-Z0-9\-_]+)", MainHandler),
+        (r'/([a-zA-Z0-9\-_]+)', MainHandler),
     ])
 
-    if __name__ == "__main__":
+    if __name__ == '__main__':
         application.listen(8888, address='127.0.0.1')
         tornado.ioloop.IOLoop.instance().start()

tests/nose_plugin.py

@@ -20,7 +20,7 @@ from nose.plugins.base import Plugin
 
 class ExtensionPlugin(Plugin):
 
-    name = "ExtensionPlugin"
+    name = 'ExtensionPlugin'
 
     def options(self, parser, env):
         Plugin.options(self, parser, env)

tests/test_udp_src.py

@@ -36,7 +36,7 @@ if __name__ == '__main__':
     # make sure they're from the same source port
     assert result1 == result2
 
-    """
+    '''
     # Test 2: same source port IPv6
     # try again from the same port but IPv6
     sock_out = socks.socksocket(socket.AF_INET, socket.SOCK_DGRAM,
@@ -82,4 +82,4 @@ if __name__ == '__main__':
 
     sock_out.close()
     sock_in1.close()
-    """
+    '''