Clarify when tab-line-switch-cycling is used

* lisp/tab-line.el (tab-line-switch-cycling): Clarify when the
variable is used.
Copyright-paperwork-exempt: yes

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/tab-line.el b/lisp/tab-line.el
index 108f9f7d99c..61a0201b298 100644
--- a/lisp/tab-line.el
+++ b/lisp/tab-line.el
@@ -646,7 +646,8 @@ using the `previous-buffer' command."
   "Enable cycling tab switch.
 If non-nil, `tab-line-switch-to-prev-tab' in the first tab
 switches to the last tab and `tab-line-switch-to-next-tab' in the
-last tab switches to the first tab."
+last tab switches to the first tab.  This variable is not consulted
+when `tab-line-tabs-function' is `tab-line-tabs-window-buffers'"
   :type 'boolean
   :group 'tab-line
   :version "28.1")