diff --git a/superset/app.py b/superset/app.py
index a037e64fb..e69377c2c 100644
--- a/superset/app.py
+++ b/superset/app.py
@@ -81,7 +81,7 @@ class SupersetAppInitializer:
 
     def pre_init(self) -> None:
         """
-        Called after all other init tasks are complete
+        Called before all other init tasks are complete
         """
         wtforms_json.init()
 
@@ -90,7 +90,7 @@ class SupersetAppInitializer:
 
     def post_init(self) -> None:
         """
-        Called before any other init tasks
+        Called after any other init tasks
         """
         pass
 
diff --git a/superset/extensions.py b/superset/extensions.py
index 4cff3b485..3e3d4e83f 100644
--- a/superset/extensions.py
+++ b/superset/extensions.py
@@ -44,9 +44,7 @@ class JinjaContextManager:
         }
 
     def init_app(self, app):
-        self._base_context = self._base_context.update(
-            app.config["JINJA_CONTEXT_ADDONS"]
-        )
+        self._base_context.update(app.config["JINJA_CONTEXT_ADDONS"])
 
     @property
     def base_context(self):