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Subject: Re: Double hyphens in variable names.
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> From: Lute Kamstra <Lute.Kamstra@cwi.nl>
> Date: Wed, 01 Oct 2003 15:53:12 +0200
> 
> I'm trying to document the variable `imenu--index-alist' in the Lisp
> Reference Manual.  When I write this in the Texinfo source file:
> 
> @defvar imenu--index-alist
> 
> Texinfo produces an info file that has this:
> 
>  - Variable: imenu-index-alist
> 
> Note that the double hyphen is reduced to a single hyphen.  Am I
> missing something, or is this a bug in Texinfo?

Not a bug, but a feature.  See the node "Conventions" in the Texinfo
manual.  In this case, you want to say

  @defvar imenu---index-alist

(three dashes in a row).