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From: Richard Stallman <rms@gnu.org>
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Subject: Re: problem with GROFF_NO_SGR
Date: Thu, 26 Dec 2002 18:39:20 -0500
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    It seems that the man process (or man's subprocess which calls groff
    or groff's subprocess which calls grotty) doesn't receive this
    environment variable.

I can't see why that would be.  The code looks correct.
Could someone debug this, please?