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Re: Reverting various commits

From: Dave Kemper
Subject: Re: Reverting various commits
Date: Mon, 23 Aug 2021 08:44:54 -0500

On 5/21/21, G. Branden Robinson <> wrote:
> The last is useful to catch almost anything that might go wrong in PS
> or PDF output, without the tedium of visually comparing such output.

Two other possibilities for scriptably regression-testing PS/PDF output:

* In cases, like man pages, that aren't doing a lot of tricky
typesetting maneuvers (e.g., dropping the E in the middle of TEX),
saving expected "groff -a" output and then diffing new runs against
that often reveals when things change on the typeset page.

* The script
which is an updated version of the script I posted about in January
compares pixels on the page of two PDFs.

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