fix(help): Don't commit to '--help' that doesn't work #3169
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We have two ways of fixing this
--help
work--help
in the help outputFor now, I went with the latter. I tried to make it clear what the
actual requirement is so we can pivot if needed.
Fixes #2892
This happens to also fix the interaction of
DisableHelpFlag
with thehelp subcommand and complcations. I've added a test to help catch if we
break this by changing how we fixed the original issue.
Fixes #2724
These issues were reported against clap3. I've not tried to reproduce
these in clap2 to see if they should show up in the release notes.