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Any suggestions on how to disable completion-at-point in Emacs shell (see below)?

I've looked in the GNU docs on the relevant hook (which is oddly named) - completion-at-point-functions - but given that the hook's value is simply a list of available functions, it's not clear to me how I can use it as a toggle.

The goal is to be able to have my TAB key back when using the Emacs shell. I'd also be okay with turning off completion-at-point-functions globally (since I'm an ido junkie) but I'm not sure how to do that for global minor modes.

As reference, this is the window I'm referring to:

Click <mouse-2> on a completion to select it.
In this buffer, type RET to select the completion near point.

Possible completions are:
CLUTTER_IM_MODULE   DBUS_SESSION_BUS_ADDRESS    DEFAULTS_PATH
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    Firstly, eshell uses pcomplete by default, completion-at-point is a fallback (call M-x find-function RET eshell-pcomplete to see it). Second, what do you mean when you say you want your “tab key back”? Do you want it to insert a tab character “\t”? – Malabarba Oct 23 '14 at 12:08
  • Am not claiming that completion-at-point is the default in eshell... Yes, that's correct, I'd like to be able to insert a tab character "\t" using the <TAB> key. – iceman Oct 23 '14 at 15:12
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(add-hook 'comint-mode-hook (lambda () (define-key comint-mode-map "\t" 'self-insert-command)))
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  • I get the following error after adding it to my init.el file: Symbol's value as variable is void: comint-mode-map. Should work conceptually though. – iceman Oct 23 '14 at 17:10
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    You need to do that after entering comint-mode. I've updated the example to show you what I mean. This is general: when you want to do something for a particular mode, you typically want to do in on the hook for that mode. See this question. – Drew Oct 23 '14 at 17:11
  • Works like a charm. Thanks for bearing with me, am new to emacs lisp – iceman Oct 23 '14 at 20:42
  • No problem. We are all learning, all the time. That's what this site is for. – Drew Oct 23 '14 at 20:51

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