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Inter-paragraph separation modified by HP

From: Alejandro Colomar
Subject: Inter-paragraph separation modified by HP
Date: Sat, 29 Apr 2023 21:02:52 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0

Hi Branden,

I was checking some warning about using HP.  It happens in uri.7.

I'm not sure I understand the macro.  From visual inspection, it's
creating inter-paragraph spacing, but from the documentation I'd
say it should only affect horizontal space, right?

It's being called as '.HP 0.2i'.  I replaced those .HP calls by .PP
to see the difference, and I don't see anything noticeable in
horizontal spacing, but see a considerable difference in the
vertical spacing.  It's used in the synopsis; it should be easy to

Is that some 1.23.0 regression maybe?

In fact, after formatting with /usr/bin/groff (the old 1.22.4), I
don't see the effects of 1.23.0, so it's a regression.  Is it known?

Attached you can see some PDFs of the page:

        Original uri.7, formatted with groff-1.23.0

        I edited the original uri.7 to use PP instead of HP,
        and formatted with groff-1.23.0.

        Original uri.7, formatted with groff-1.22.4.


P.S.: Sorry for finding regressions :p

GPG key fingerprint: A9348594CE31283A826FBDD8D57633D441E25BB5

Attachment: uri.7.pdf
Description: Adobe PDF document

Attachment: uri_PP.7.pdf
Description: Adobe PDF document

Attachment: uri_old.pdf
Description: Adobe PDF document

Attachment: OpenPGP_signature
Description: OpenPGP digital signature

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