info-lookup annoyance

[Jesper Harder]

In GNU Emacs 21.3.50.86 (i686-pc-linux-gnu, GTK+ Version 2.0.2)
 of 2004-03-07 on defun.localdomain

It's a bit annoying that `info-lookup-symbol' doesn't reuse an
existing Info buffer.

Steps to reproduce:

* Open an Emacs Lisp file.
* Split the frame in two windows
* Open Info in one window
* Use `C-h S' (info-lookup-symbol) to look up a symbol in the Lisp
  file.

Result: _Both_ windows are used for Info.  `info-lookup' should have
reused the existing Info window.  I think the patch below fixes it.

[BTW, I know I've whined about it before: but please keep the existing
keybinding `C-h C-i' for `info-lookup-symbol' -- `C-h S' is too
difficult to type].

2004-03-08  Jesper Harder  <address@hidden>

        * info-look.el (info-lookup): Reuse existing Info window.

*** /home/harder/emacs/lisp/info-look.el.~1.38.~        Fri Feb 27 21:29:04 2004
--- /home/harder/emacs/lisp/info-look.el        Mon Mar  8 14:31:35 2004
***************
*** 338,344 ****
               (info-frame (and window (window-frame window))))
          (if (and info-frame
                   (display-multi-frame-p)
!                  (memq info-frame (frames-on-display-list)))
            (select-frame info-frame)
          (switch-to-buffer-other-window "*info*")))))
      (while (and (not found) modes)
--- 338,345 ----
               (info-frame (and window (window-frame window))))
          (if (and info-frame
                   (display-multi-frame-p)
!                  (memq info-frame (frames-on-display-list))
!                  (not (eq info-frame (selected-frame))))
            (select-frame info-frame)
          (switch-to-buffer-other-window "*info*")))))
      (while (and (not found) modes)