APi for listing VM in controller

gns3server/handlers/api/controller/compute_handler.py

@@ -58,7 +58,7 @@ class ComputeHandler:
     def list(request, response):
 
         controller = Controller.instance()
-        response.json([ c for c in controller.computes.values() ])
+        response.json([c for c in controller.computes.values()])
 
     @classmethod
     @Route.post(