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e8a0b400d8
Problem:
`getdigits_int(pp, strict, def)` returns `def` only when the number
fails to parse or overflows, never when the text parses to a literal
`0`, so `%.0` leaves `maxwid` at 0. Both render paths then break down:
`l > maxwid` is always true and `while (l >= maxwid)` consumes the whole
string, so `%.0f` comes out as `<` and `%.0l` as `0>3`.
Vim guards for this right after the same call. Nvim had the guard too
until 3344cffe7b ("getdigits: introduce `strict`, `def` parameters"),
which folded it into the new `def` argument and so changed what a
literal zero means. The neighbouring `minwid` call was translated
correctly.
Solution:
Fall back to 50 when the parsed width is not positive, as Vim does.
AI-assisted