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[bug #63354] Refine fallbacks.tmac

From: G. Branden Robinson
Subject: [bug #63354] Refine fallbacks.tmac
Date: Mon, 26 Dec 2022 01:45:13 -0500 (EST)

Follow-up Comment #19, bug #63354 (project groff):

[comment #15 comment #15:]

> 0 permanently remove \[u2026] (comment #6)

> 0 Should be done before 1.23: only degrades typography without any upside in
real-world usage, since Symbol will always be there.

The (PostScript) Symbol font won't be there on nroff devices.  And if you're
right for troff devices that Symbol is _always_ there and it _always_ defines
this glyph, it _can't_ degrade typography.

You might however be forgetting grodvi and grolbp, which don't offer the PS
Symbol font.  grolbp in fact doesn't offer any special fonts at all. 
(Technically, they're _all_ special.  ¯\_(ツ)_/¯ )

On nroff devices, users of "ascii" and "latin1" devices actually come out
ahead of "utf8" users.

$ printf 'foo\\[u2026]bar\n' | tgu | cat -s
$ printf 'foo\\[u2026]bar\n' | tg -Tascii | cat -s
$ printf 'foo\\[u2026]bar\n' | tg -Tlatin1 | cat -s

So I'm inclined to keep this one.


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