bug#18205: Obsolete patterns in auto-mode-alist

[Glenn Morris]

Reuben Thomas wrote:

> The default value for auto-mode-alist currently contains the following:
>
>      ;; .emacs or .gnus or .viper following a directory delimiter in
>      ;; Unix, MSDOG or VMS syntax.
>      ("[]>:/\\]\\..*\\(emacs\\|gnus\\|viper\\)\\'" . emacs-lisp-mode)
>      ("\\`\\..*emacs\\'" . emacs-lisp-mode)
>      ;; _emacs following a directory delimiter
>      ;; in MsDos syntax
>      ("[:/]_emacs\\'" . emacs-lisp-mode)
>
> There are two non-standard spellings:
>
> s/MSDOG/MS-DOS/

It's a hilarious joke that certainly remains as side-splitting and
relevant today as it was in the 80's.