emacs-28 7404f4b: Improve doc string of 'highlight-nonselected-windows'

[Eli Zaretskii]

branch: emacs-28
commit 7404f4b4e0bf472d5f161957ff23e30df0e8b96d
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Improve doc string of 'highlight-nonselected-windows'
    
    * src/xdisp.c (syms_of_xdisp) <highlight-nonselected-windows>:
    Clarify the doc string.  (Bug#51927)
---
 src/xdisp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index c05e7ed..0316408 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -35205,7 +35205,9 @@ line number may be omitted from the mode line.  */);
   line_number_display_limit_width = 200;
 
   DEFVAR_BOOL ("highlight-nonselected-windows", highlight_nonselected_windows,
-    doc: /* Non-nil means highlight region even in nonselected windows.  */);
+    doc: /* Non-nil means highlight active region even in nonselected windows.
+When nil (the default), the active region is only highlighted when
+the window is selected.  */);
   highlight_nonselected_windows = false;
 
   DEFVAR_BOOL ("multiple-frames", multiple_frames,