[MLton] Emacs mode for editing ML Basis files

[Stephen Weeks]

An indentation case I'm not so sure about -- perhaps it would be
better to ignore the indentation of comments when deciding how to
indent subsequent lines?  For example, in the following, I would like
z.sml where it is, even though the comment is in column zero.

local
(* This is a comment. *)
   z.sml
in   
end

Currently, the indentor moves z.sml to column zero.

It is a separate question if the indentor should move the comment to
column three if I ask it to indent that line.  I'm not sure what to
do there (currently, the comment is moved).