bug#17831: 24.4.50; bad default value for `Man-width'

[Juri Linkov]

> But I still prefer an async process that gives me:
> - empty buffer after 0s
> - full first page displayed after 0.1s
> - buffer fully filled and ready after 5s
> over a sync process that blocks for 3s.

This simple patch displays the buffer immediately,
but then slowly fills it with unformatted output
that doesn't look nice.  So maybe better would be to create
a temporary hidden buffer, do formatting in background,
and copy the formatted text to the displayed buffer.

=== modified file 'lisp/man.el'
--- lisp/man.el 2014-05-09 07:02:00 +0000
+++ lisp/man.el 2014-06-24 23:47:12 +0000
@@ -1056,6 +1056,7 @@ (defun Man-getpage-in-background (topic)
       (require 'env)
       (message "Invoking %s %s in the background" manual-program man-args)
       (setq buffer (generate-new-buffer bufname))
+      (Man-notify-when-ready buffer)
       (with-current-buffer buffer
        (setq buffer-undo-list t)
        (setq Man-original-frame (selected-frame))