Re: something like linum.el ought to be added

[Richard Stallman]

It looks good, except for minor nits.  It can be installed, with these
nits fixed.

    +  if (!current_matrix_up_to_date_p
    +      && !NILP(Vwindow_bottom_change_functions))
    +      safe_run_hooks (Qwindow_bottom_change_functions);

It needs a space between NILP and the paren.

    +  DEFVAR_LISP ("window-bottom-change-functions", 
&Vwindow_bottom_change_functions,
    +    doc: /* List of functions to call when visibility changes may have 
altered
    +the position of the bottom of the window. */);

The first line of that doc string (like every doc string) should stand
on its own.