unfill-paragraph(region) is different in GNU emacs and xemacs

[Uwe Brauer]

>>>>> "Stephen" == Stephen J Turnbull <turnbull at sk.tsukuba.ac.jp> writes:

   > Reply-To set to xemacs-beta, as it seems this subthread is offtopic on
   > emacs-devel.

   > Uwe Brauer writes:

   >> No it does not surprise, it is Xemacs filling function itself with
   >> behaves different.

   >> Could somebody from the Xemacs dev team comment on this?

   > Yeah, they're different.  I doubt anybody has given the core fill
   > function love in a couple decades, everybody uses filladapt as far
   > as I know.  It's one of those things where we kept the core
   > function for compatibility with Emacs despite a far superior
   > third-party implementation (it was at the time, anyway; I've used
   > nothing else for over two decades).

   > On your sample text, with filladapt it does what I would expect: it
   > treats the first and last lines (which have different prefixes from
   > the rest of the lines) as separate paragraphs, and fills the middle
   > lines to a single line with the same indentation.

But Steve, filladapt is *not* turned on. As I said I used 
xemacs -vanilla and that does not turn on filladapt. Given that I find
the filling behavior odd.

Uwe