[Maxima] how to stop the annotation of lists by filenames?

[Stavros Macrakis]

On Thu, May 29, 2008 at 12:56 PM, Oliver Kullmann
<O.Kullmann at swansea.ac.uk> wrote:
> alright, this seems to work (passes my tests)!
> (I already thought, syntax looks fishy, but god knows
> what Lisp allows ;-).

Fishy?  In what way?

    (defun add-lineinfo (lis) lis)

is equivalent to Maxima:

    add_lineinfo(lis) := lis $