updated xscheme.el

[Chris Hanson]

   Date: Tue, 4 Dec 2001 09:17:35 -0700 (MST)
   From: Richard Stallman <rms@gnu.org>

   Could you write change log entries for the changes from the Emacs 21.1
   version?  We would like to have that.

Here they are:

2001-12-03  Chris Hanson  <cph@zurich.ai.mit.edu>

        * Add (sleep-for 0.1) after signaling an interrupt, in order to
        work around race condition.  Use `process-send-string' rather than
        `send-string'.  Implement xscheme-delete-output command (C-c C-o
        in *scheme* buffer).

        * Insert a newline after an expression that is submitted in the
        interaction buffer, for consistency with recent changes to Edwin.

        * Don't write a space after a command prompt.  The
        PROMPT-FOR-COMMAND- procedures will take care of this for us.

        * Simplify customization of scheme-interaction-mode-commands by
        allowing user to provide partial specification of commands alist
        before this file is loaded.

        * Add mechanism for evaluating emacs expressions outside of the
        process-filter's save-excursion.

        * Allow customization of scheme-interaction-mode-commands.

        * Fix bug that caused strings to get inserted in the wrong place.

        * Recognize patterned prompts that should print in the Scheme
        buffer.

        * Handle xscheme-control-g-disabled-p correctly in non-interaction
        buffers.

        * Add multiple buffer support.  Add an expression ring per buffer.

        * Re-enable ^G interrupts whenever entering input wait.