Patch for fit-window-to-buffer

[Justin Burkett <justin@burkett.cc>]

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Hello,

I found a bug in the master and emacs-27 versions of fit-window-to-buffer.
Another window's data might be used to determine the new width. I'm
attaching a patch which I believe fixes the issue.

Justin

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From 02915c7c1b2b166d7dd0302bfac3f9ef880cbe59 Mon Sep 17 00:00:00 2001
From: Justin Burkett <justin@burkett.cc>
Date: Tue, 3 Mar 2020 22:01:29 -0500
Subject: [PATCH] * lisp/window.el (fit-window-to-buffer): Don't use wrong
 window data

---
 lisp/window.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/window.el b/lisp/window.el
index bd825c09e1..61c32ac72f 100644
--- a/lisp/window.el
+++ b/lisp/window.el
@@ -9124,7 +9124,8 @@ fit-window-to-buffer
 	       ;; wider than its frame's pixel width, its height
 	       ;; remains unaltered.
 	       (width (+ (car (window-text-pixel-size
-			       window (window-start) (point-max)
+			       window (window-start window)
+                               (with-selected-window window (point-max))
 			       (frame-pixel-width)
 			       ;; Add one line-height to assure that
 			       ;; we're on the safe side.  This
-- 
2.21.1 (Apple Git-122.3)