On Tue, 18 Feb 2025 at 09:10, Petr Olsak <p...@olsak.net> wrote: > On 2/17/25 18:12, luigi scarso wrote: > > > So it's a bug even considering > 7.5.5 Math italic mess > of the reference luatex.pdf ? > > -- > luigi > > Section 7.5.5 is very vague, its example of \mathitalicsmode=0 or 1 show > no difference (more exactly: I am unable to see any difference). > > When we keep the example 1.$f!$, 2. $f$!, 3. $f\/$! and we say, that > italic correction inserted is correct in all three cases (as XeTeX does > it), then we can see: > > \mathitalicmode=0: 1. OK, 2 bad, 3. bad > > \mathitalicmode=1: 1. OK, 2 bad, 3. OK > > \mathitalicmode=2: 1. bad, 2 OK, 3. OK > > It is magic. > > Petr >
nothing is magic, at most it is not well documented; the C code is the definitive reference. See https://github.com/TeX-Live/texlive-source/blob/trunk/texk/web2c/luatexdir/tex/mlist.c -- luigi
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