@var{function} is a command (@pxref{Interactive Call}), the value is a
list of the form @code{(interactive @var{spec})}, where @var{spec} is
the descriptor specification used by the command's @code{interactive}
-form to compute the function's arguments (@pxref{Using Interactive}).
-If @var{function} is not a command, @code{interactive-form} returns
-@code{nil}.
+form to compute the function's arguments. If @var{function} is not a
+command, @code{interactive-form} returns @code{nil}.
@end defun
@node Interactive Codes
@item D
A directory name. The default is the current default directory of the
-current buffer, @code{default-directory} (@pxref{System Environment}).
+current buffer, @code{default-directory} (@pxref{File Name Expansion}).
Existing, Completion, Default, Prompt.
@item e