Pádraig Brady 30d296dcb8 fmt: interpret -w as an inclusive maximum
This aligns with `fold -w` and BSD `fmt` implementations.

* src/fmt.c (fmt_paragraph): Check len <= max_width.
* tests/fmt/width.sh: Add a new test.
* tests/local.mk: Reference the new test.
* NEWS: Mention the change in behavior.
Addresses part of https://bugs.gnu.org/79497
2026-01-08 12:08:14 +00:00
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2026-01-01 10:56:16 -08:00