URL:
<https://savannah.gnu.org/bugs/?61394>
Summary: [troff] emits U+2010 HYPHEN when interpolating
negative register values
Project: GNU troff
Submitted by: gbranden
Submitted on: Wed 27 Oct 2021 09:34:20 AM UTC
Category: Core
Severity: 3 - Normal
Item Group: Incorrect behaviour
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release: None
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Details:
I was updating an example from our Texinfo manual and got a surprising
result.
Input:
.nr a 10
.af a 0 \" the default format
\na,
.af a I
\na,
.af a 321
.nr a (-\na)
\na,
.af a a
\na
Output:
10, X, ‐010, ‐j
Let's go to the instant xxd(1) replay:
00000000: 3130 2c20 582c 20e2 8090 3031 302c 20e2 10, X, ...010, .
00000010: 8090 6a0a 0a ..j..
When formatting a negative number, GNU troff(1) should probably interpolate
the symbol that all the troff documentation ever written has sworn up and down
is a minus sign.
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