Print version of notebook

jupyter_server/prometheus/metrics.py

@@ -12,7 +12,10 @@
 except ImportError:
     notebook_version_info = None
 
+
 if notebook_version_info is not None and notebook_version_info < (7,):
+    print("yes, we think we have an unshimmed notebook package")
+    print(notebook_version_info)
     # Jupyter Notebook v6 also defined these metrics.  Re-defining them results in a ValueError,
     # so we simply re-export them if we are co-existing with the notebook v6 package.
     # See https://github.com/jupyter/jupyter_server/issues/209