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Date: Wed, 26 Nov 2014 17:23:29 -0800
From: Ray Andrews <rayandrews@eastlink.ca>
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To: Zsh Users <zsh-users@zsh.org>
Subject: environment stuff.
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When you do a complete dump of the environment, there's this
ginormous thing that starts:

    typeset -A _comps
    _comps=(- _precommand -array-value- _value -assign-parameter-
    _assign -brace-parameter- _brace_parameter -command- _autocd
    -command-line- _normal -condition- _condition -default- _default ...

... and ends:

      _zstyle ztodo _ztodo zxpdf _xpdf zypper _zypper )

What on Earth is it? Where does stuff like that get set?