[Bug: 21.5-b28] auto-fill doesn't work in gnuclient started buffer/frame

[Stephen J. Turnbull]

It's me FKtPp ;) writes:

 > This is very strange. I use Mutt as my mail user agent and set editor
 > to gnuclient so that I can use XEmacs as my message editor.
 > 
 > After compose several mail messages I noticed that, the auto-fill is
 > actually did not functional in the newly created XEmacs frame. I have
 > to refill every long line by hand even if the mode-line indicator
 > showing the buffer is in auto-fill-mode.

Perhaps you don't understand what "auto-fill" means in Emacs.  It does
not mean that existing text will be reflowed.  So quoted material will
not be automatically reflowed by auto-fill modes.  What does get
automatically reflowed is newly entered text.

To get the current paragraph reflowed, use M-q.  To reflow the whole
buffer, use C-x h M-q.  To get the effect you probably want (reflowing
the quoted text automatically), you will have to use a hook that first
arranges to exclude headers from the fill region, then fills the region.

If you're having difficulty getting new text to reflow properly, then
that's definitely a bug, but we'll need more detail to diagnose it.