-A general mechanism is provided for special handling of the working
-directory in special major modes:
-
-@table @code
-@item dired-default-directory-alist
-@vindex dired-default-directory-alist
-Default: @code{((dired-mode . (dired-current-directory)))}
-
-Alist of major modes and their notion of @code{default-directory}, as a
-Lisp expression to evaluate. A resulting value of @code{nil} is ignored
-in favor of @code{default-directory}.
-
-@item dired-default-directory
-@findex dired-default-directory
-Use this function like you would use the variable
-@code{default-directory}, except that @code{dired-default-directory}
-also consults the variable @code{dired-default-directory-alist}.
-@end table
+@findex dired-smart-shell-command
+@findex shell-command
+@kindex M-!
+The command @code{dired-smart-shell-command}, bound to @kbd{M-!} in
+Dired buffers, is like @code{shell-command}, but it runs with
+@code{default-directory} bound to the current Dired directory.