to_latex wrote \sin^2\theta as {\sin }^{2}{\theta }, which reads back as
(\sin)^2 followed by θ: the braces cut the name off from its argument. An
operator name written as a command now takes its scripts directly
(\sin ^{2}{\theta }). The corpus test no longer needs its exception.
The corpus equations go through OMML, MathML and LaTeX and back; the OMML
samples are written back as kept and from the tree. GridCraft's OMML to
LaTeX test cases (crates/xlsx/src/omml.rs) give LaTeX that reads back the
same through the tree. omml::parse and read_str are tested against other
prefixes, the strict namespace, kept OMML, junk, the element cap and deep
nesting.
Dylan M. Taylor