[Issue 17090] `dmd -transition=?` needs quoting => make it `-transition=help`

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17090

Martin Nowak <code at dawg.eu> changed:

           What    |Removed                     |Added
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                 CC|                            |code at dawg.eu

--- Comment #1 from Martin Nowak <code at dawg.eu> ---
It's not new and also used by -mcpu=?. I agree that `help` should be an alias
for `?`.

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