[nongnu] elpa/undo-fu-session e6ba8d6330 41/53: Cleanup: expand on comment

[ELPA Syncer]

branch: elpa/undo-fu-session
commit e6ba8d6330982814962cd2bc30994d9b9612a35d
Author: Campbell Barton <ideasman42@gmail.com>
Commit: Campbell Barton <ideasman42@gmail.com>

    Cleanup: expand on comment
---
 undo-fu-session.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/undo-fu-session.el b/undo-fu-session.el
index 9cf059587e..c896cdae08 100755
--- a/undo-fu-session.el
+++ b/undo-fu-session.el
@@ -510,7 +510,8 @@ Argument PENDING-LIST an `pending-undo-list' compatible 
list."
           (emacs-undo-equiv-table nil))
 
         (cond
-          ;; Simplified linear history (no redo).
+          ;; Simplified linear history (no redo or implicit tree-structure).
+          ;; Only store steps reachable by calling `undo-only'.
           (undo-fu-session-linear
             (setq emacs-buffer-undo-list
               (undo-fu-session--encode