GitLab

(ielm-map): Use ielm-tab for tab.
(ielm-complete-filename): Use comint-filename-completion.
(ielm-complete-symbol): Remove.
(inferior-emacs-lisp-mode): Use lisp-completion-at-point instead and
remove ielm-tab from completion-at-point-functions.

Fixes: debbugs:16224