Noam Postavsky <npostavs@gmail.com> writes:

> One minor question, what does the "C-a-k" mean
> in your original report?

I think Xristos meant C-a C-k.

The only thing needed to make ielm file name completion work on my
system (see signature for its details) is to add ?\s to
comint-file-name-chars, e.g.: