Fix: change parso logging level (#14119)

This PR closes  #10946.

We set explicitely the log level of parso so that global changes to log level do not trigger parso logging.

IPython/core/logger.py

@@ -15,10 +15,15 b''
 # Python standard modules
 import glob
 import io
+import logging
 import os
 import time
 
 
+
+# prevent jedi/parso's debug messages pipe into interactiveshell
+logging.getLogger("parso").setLevel(logging.WARNING)
+
 #****************************************************************************
 # FIXME: This class isn't a mixin anymore, but it still needs attributes from
 # ipython and does input cache management.  Finish cleanup later...