Fix docstring for Panel.generate_stats

It was out of alignment with what it actually does.

Author: tim-schilling

debug_toolbar/panels/__init__.py

@@ -203,14 +203,13 @@ def generate_headers(self, request, response):
 
     def generate_stats(self, request, response):
         """
-        Called after :meth:`process_request
-        <debug_toolbar.panels.Panel.process_request>`, but may not be executed
-        on every request. This will only be called if the toolbar will be
-        inserted into the request.
-
         Write panel logic related to the response there. Post-process data
         gathered while the view executed. Save data with :meth:`record_stats`.
 
+        Called after :meth:`process_request
+        <debug_toolbar.panels.Panel.process_request>`.
+
+
         Does not return a value.
         """