bug#45333: complex command history should not save optional nil parameters

[Lars Ingebrigtsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> For 1), we could also stash the actual arglist in addition to the
>> advertised calling convention into .elc/DOC (i.e., two (fn ...) forms,
>> for instance).
>
> Why/when do we need the non-advertized arglist?

Because (foo [bar zot] ...) isn't very helpful when doing low level
stuff.  So `help-function-arglist' returns a non-name-preserving list in
that case.

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