+ (defadvice dired-summary (around sd/dired-summary activate)
+ "Revisied dired summary."
+ (interactive)
+ (dired-why)
+ (message
+ "Δ: d-delete, u-ndelete, x-punge, f-ind, o-ther window, R-ename, C-opy, c-create, +new dir, r-evert, h-summary, ?-help,"))