fix typo in comment

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62346 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/python/temporal/core.py

@@ -244,7 +244,7 @@ def _init_tgis_message_interface(raise_on_error=False):
 
 def get_tgis_message_interface():
     """Return the temporal GIS message interface which is of type
-       grass.pyhrass.message.Messenger()
+       grass.pygrass.message.Messenger()
 
        Use this message interface to print messages to stdout using the
        GRASS C-library messaging system.