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From: Kin Cho <kin@techie.com>
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Subject: Re: automatically turn on hexl-mode
Date: 05 Jun 2003 11:10:46 -0700
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Hi,

> The simplest and still reliable criterium was to just look for
> a NUL byte in the first 1K of the file.

Coincidentally, I settled on this heuristic as well.

-kin