Fix flake8 error

Author: ashwoods

raven/scripts/runner.py

@@ -42,9 +42,10 @@ def get_uid():
         return None
     try:
         return pwd.getpwuid(os.geteuid())[0]
-    except KeyError: # Sometimes fails in containers
+    except KeyError:  # Sometimes fails in containers
         return None
 
+
 def send_test_message(client, options):
     sys.stdout.write("Client configuration:\n")
     for k in ('base_url', 'project', 'public_key', 'secret_key'):