The string is passed through `substitute-command-keys' before it
is displayed.
-If INHIBIT-WARNING is non-nil, this prevents display of the warning
-message in case there is no help properties at point.
+If INHIBIT-WARNING is non-nil, do not display a warning message when
+there is no help property at point.
If DESCRIBE-BUTTON in non-nil (interactively, the prefix arg), and
there's a button/widget at point, pop up a buffer describing that