Joseph Wright

I'm gong to need to see some use of this in professionally-typeset material.

This came up parenthetically in https://tex.stackexchange.com/questions/706404/expl3s-regex-replace-all-has-a-problem-with-german-%c3%9f-why. As we now have fast data tables for Unicode, we could look to load additional data for this area. I'd say we should likely...

> That sounds interesting to do. With XeTeX/LuaTeX nothing to do for now, I suppose? What about pTeX/upTeX? More like pdfTeX than like the Unicode engines - but can be...

> What do we do with malformed utf8? It's not l3regex's job to detect it or fix it, but it would be good to have some clear rule about what...

True but this is there for dealing with older code anyway - I agree we should address but it's not a high priority.

The reason for having `\numproduct` is for things like floor areas - I'm not really seeing the same need for ratios.

As mentioned in https://github.com/josephwright/siunitx/issues/447#issuecomment-1375670524, you can use ```latex \ExplSyntaxOn \msg_redirect_name:nnn{siunitx}{physics-pkg}{none} \ExplSyntaxOn ``` to suppress the warning.

'All tests' from an `l3build` point of view means all `.lvt` files - that's the only number we can reasonably track as we can't really count up _inside_ multiple `.lvt`...

Note that whilst many more recent `.lvt` files include at least one `\TEST` line, that's not required and not seen in many of the older ones at all. So counting...

'All checks passed' means that a run generates no `.diff` (or `.fc`) files - that running `diff` (or similar) for each test file doesn't yield a difference from the reference...