bug#17566: 24.4.50; describe parameters in doc string: `dired-move-to-filename' etc.

[Lars Ingebrigtsen]

Drew Adams <drew.adams@oracle.com> writes:

> Subject line says it all.  Parameters should be described in doc
> strings!  In the case of `dired-move-to-filename' it is not at all
> obvious what parameter RAISE-ERROR means, for example.  Even the code
> comments seem to have trouble describing what RAISE-ERROR is for.

I've now documented the parameters to that function in Emacs 27.

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