mik-laj commented on a change in pull request #21879:
URL: https://github.com/apache/airflow/pull/21879#discussion_r817797316



##########
File path: airflow/cli/cli_parser.py
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@@ -1362,7 +1362,8 @@ class GroupCommand(NamedTuple):
     ),
     ActionCommand(
         name='downgrade',
-        help="Downgrade the schema of the metadata database",
+        help="Downgrade the schema of the metadata database.  Must provide 
either `--revision` "

Review comment:
       The `help` field should contain one sentence. Additional information can 
be added in `description` field. We use `help` field to display cheat-sheet, so 
we have to be careful that this command is still readable and only contains the 
key information.




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