Merge branch '153957-patch-1' into 1.1.1

mwouts · Apr 16, 2019 · c3533f9 · c3533f9
2 parents 939d437 + 08b8951
commit c3533f9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/jupytext/__init__.py b/jupytext/__init__.py
@@ -17,9 +17,9 @@ def __init__(self):
 
 def load_jupyter_server_extension(app):  # pragma: no cover
     """Use Jupytext's contents manager"""
-    if app.contents_manager_class == TextFileContentsManager:
+    if isinstance(app.contents_manager_class, TextFileContentsManager):
         app.log.info("[Jupytext Server Extension] NotebookApp.contents_manager_class is "
-                     "jupytext.TextFileContentsManager already - OK")
+                     "(a subclass of) jupytext.TextFileContentsManager already - OK")
         return
 
     # The server extension call is too late!