The custom help() is replaced by a COMMAND() description, and --introspect-cli is added. --help now goes through the pager, like other commands with --no-pager. Also, previously, -h/--help/--version were listed in the "Commands" section. This was cute, but recreating this in the new scheme would be complicated. Also, it seems unnecessary. --help/--version and some other commands terminate the program in all binaries, so they could be considered "commands" in all cases. But we printed them together with verbs only in a few cases. So I think it's fine to move them back to the "Options" section. This makes the description of options much more consistent between different programs.
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