No completion after sudo in (e)shell

[Thierry Volpiatto]

emacs -Q
M-x eshell

apt- <TAB> completion for apt commands popup
*sudo apt- <TAB> nothing

Same in M-x shell

Adding a pcomplete/sudo function fix this (At least in eshell, I don't
use shell).

--8<---------------cut here---------------start------------->8---
(defun pcomplete/sudo ()
  (let ((prec (pcomplete-arg 'last -1)))
    (cond ((string= "sudo" prec)
           (while (pcomplete-here*
                   (funcall pcomplete-command-completion-function)
                   (pcomplete-arg 'last) t))))))
--8<---------------cut here---------------end--------------->8---

Not a bug just something missing.

-- 
  Thierry
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