Specifies how to display a message whenever you move to the widget with
either @code{widget-forward} or @code{widget-backward} or move the mouse
over it (using the standard @code{help-echo} mechanism). The argument
-is either a string to display or a function of one argument, the widget,
-which should return a string to display.
+is either a string to display, a function of one argument, the widget,
+which should return a string to display, or a form that evaluates to
+such a string.
@vindex indent@r{ keyword}
@item :indent