bug#5519: command-switch-alist

[Chong Yidong]

> The GNU Emacs Lisp Reference Manual (section 39.1.4) describes the
> variable `command-switch-alist', saying specifically that the CAR should
> be a string, _not_ including the initial hyphen.
>
> My experiments indicate that the CAR string should indeed include the
> initialy hyphen. I can create a custom option using "-c",
>
>   (setq command-switch-alist '(("-c" . (lambda (arg)(c-mode)))))
>   $ emacs -c  # starts successfully in c-mode
>
> but not using "c":
>
>   (setq command-switch-alist '(("c" . (lambda (arg)(c-mode)))))
>   $ emacs -c  # Emacs says: Unknown option `-c'
>
> Therefore, it appears that there is a bug either in Emacs or the Lisp
> manual, since they disagree on whether the CAR string should include the
> initial hyphen or not.

Thanks for the bug report.  This was a bug in Emacs 23 (Emacs 22 worked
according to the description in the Elisp manual).  I've checked in a
fix.