Re: groff 1.24.0 bans C0 controls in identifiers (was: groff 1.24.0 released)

"G. Branden Robinson" <[email protected]> Fri, 6 Mar 2026 01:14:57 -0600

Newsgroups	gmane.comp.printing.groff.general
Message-ID	<20260306071457.iuksrwv6tcydmtw3@illithid>

[self-follow-up to correct an error]

Please ignore the following paragraph.

At 2026-03-06T00:57:57-0600, G. Branden Robinson wrote:
>     First, not trusting file(1), I built a list of "sophisticated"
>     *roff documents by searching for any document that had an AT&T
>     style control request in it.  This would, admittedly, not have
>     caught documents that changed the control character before issuing
>     `if` or `ie` requests, or which wrapped or replaced them.
>     (Replacing them would be a pretty neat trick, though Doug
>     McIlroy's Turing-complete simple macro expander would seem to
>     establish that it is, in fact, possible.[8])

The quoted email took a while to compose, and in the course of doing so
I changed my approach to gathering relevant information.  The foregoing
is a relic thereof.

> [8] https://www.cs.dartmouth.edu/doug/barem4.txt

However, I'm glad to bring attention to this nifty document.  :)

Regards,
Branden

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