Use black for formatting

atst/handlers/main.py

@@ -1,11 +1,11 @@
 import tornado
 from atst.handler import BaseHandler
 
-class MainHandler(BaseHandler):
 
+class MainHandler(BaseHandler):
     def initialize(self, page):
         self.page = page
 
     @tornado.web.authenticated
     def get(self):
-        self.render( '%s.html.to' % self.page, page = self.page )
+        self.render("%s.html.to" % self.page, page=self.page)