fill-command in Ada mode

[Florian Weimer]

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In GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit)
 of 2001-10-27 on deneb
configured using `configure  --prefix=/opt/emacs-21.1'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

When using Ada mode, 'fill-paragraph' changes paragraphs such as

   --  This stype is a string address.  It is much like a chars_ptr
   --  (e.g. the string has to be NUL-terminated), but we want to
   --  avoid all conversions involved with chars_ptr for such low-level
   --  applications as this.

to

   --  This stype is a string address.  It is much like a chars_ptr
   -- (e.g. the string has to be NUL-terminated), but we want to
   -- avoid all conversions involved with chars_ptr for such low-level
   -- applications as this.

With previous versions of ada-mode, you could use an assignment such
as '(setq ada-fill-comment-prefix "-- ")' to change this behavior, but
this no longer works.

(The two spaces are required by GNAT, the GNU Ada compiler).