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Rich-click does not format nested commands

See original GitHub issue

Nested commands are not formatted at all. Because I couldn’t get my script to work correctly I tried the simple example script. I get:

$ python rich_click_ex1.py

 Usage: rich_click_ex1.py [OPTIONS] COMMAND [ARGS]...

 My amazing tool does all the things.
 This is a minimal example based on documentation from the 'click' package.
 You can try using --help at the top level and also for specific group
 subcommands.

╭─ Options ────────────────────────────────────────────────────────────────────╮
│ --debug/--no-debug  -d/-n    Enable debug mode. Newlines are removed by      │
│                              default.                                        │
│                              Double newlines are preserved.                  │
│ --help                       Show this message and exit.                     │
╰──────────────────────────────────────────────────────────────────────────────╯
╭─ Commands ───────────────────────────────────────────────────────────────────╮
│ download  Optionally use short-help for the group help text                  │
│ sync      Synchronise all your files between two places. Example command     │
│           that doesn't do much except print to the terminal.                 │
╰──────────────────────────────────────────────────────────────────────────────╯

This works as advertised. However:

$ python rich_click_ex1.py sync --help
Debug mode is off
Usage: rich_click_ex1.py sync [OPTIONS]

  Synchronise all your files between two places. Example command that
  doesn't do much except print to the terminal.

Options:
  --type TEXT  Type of file to sync  [default: files; required]
  --all
  --help       Show this message and exit.

This does not work as advertised. Am I missing something? Should the example script be updated or is this a bug?