mouse-drag-copy-region doc string clarification

* lisp/mouse.el (mouse-drag-copy-region): Clarify that the
variable only applies to selections in Emacs (bug#41856).

diff --git a/lisp/mouse.el b/lisp/mouse.el
index 640f10af4e1a5605c6c1c6ea2ee5d45b8d013b77..d369545f18ec7c11a435cb946bced6edfff9b44b 100644 (file)
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -49,7 +49,10 @@
   "If non-nil, copy to kill-ring upon mouse adjustments of the region.
 
 This affects `mouse-save-then-kill' (\\[mouse-save-then-kill]) in
-addition to mouse drags."
+addition to mouse drags.
+
+This variable applies only to mouse adjustments in Emacs, not
+selecting and adjusting regions in other windows."
   :type 'boolean
   :version "24.1")