bug#29842: 27.0; `dired-change-marks': args should not be optional

[Stefan Kangas]

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

> 1. There is no use of this function in the Emacs Lisp sources that needs
>    to have the args be optional.
>
> 2. If (dired-change-marks) is evaluated then you get an error:
>
>    Debugger entered--Lisp error: (error "Format specifier doesn't match
>                                          argument type") 
>     format("\n%c" "nil")
>     dired-change-marks()
>     eval((dired-change-marks))
>
> This bug is apparently quite old - it is present in Emacs 20, for
> example.

Fixed on master in commit 3d81d2326a.

Best regards,
Stefan Kangas