Extra vertical space in math mode

[ramiromagno]

See:

• Source: https://github.com/ramiromagno/hello
• Website: https://rmagno.eu/hello/index.html

This seems to be the case also with current pkgdown's article about math: https://pkgdown.r-lib.org/articles/test/rendering.html?q=math#math.

[jayhesselberth]

I'm not clear what the issue is here. Too much vertical space? Not enough?

IMO the math on the pkgdown website looks fine, and the div is pretty cropped already.

You can change the math rendering engine in pkgdown sites, and the rendered equations do have subtle differences (font types / sizes) between the engines.

You could also change spacing on a per-site basis with some custom CSS.

[ramiromagno]

Could you please take a screenshot? Because I see too much extra vertical space when compared to previous rendering with earlier versions of pkgdown.

[hadley]

It looks fine to me too. What browser are you using?

[ramiromagno]

Thank you @hadley.

I noticed a big difference in the spacing from earlier versions to the newest version. I'm trying to generate a new website using pkgdown 2.0.0 to hopefully illustrate what I mean more clearly, so that you guys don't get the impression that this is just a small styling difference.

BTW: I'm using Firefox 125.0.3 (64-bit).

[ramiromagno]

okay, let me know if this difference is to be expected:

• pkgdown 2.1.0: https://rmagno.eu/hello
• pkgdown 2.0.0: https://rmagno.eu/hello2 (btw: the \eqn{} here is solved)

Just to make sure I communicate what I see in case there are browser / environment differences:

pkgdown 2.1.0

---

pkgdown 2.0.0

---

[hadley]

This is how the pkgdown 2.1.0 website looks for me in safari:

And this is what it looks like for me in firefox:

So seems like something weird is going on on your end.

[jayhesselberth]

These differences could also be attributable to the (very) old MathJax that pkgdown was using in 2.0.0.

[ramiromagno]

Yeah, I am investigating what on my end might be causing this. Using ArchLinux is definitely a good clue...

I am looking into this: https://wiki.archlinux.org/title/Firefox#Some_MathML_symbols_are_missing.

But thanks for the all the help so far. Please don't close this issue just yet, even though it is clear that it is about my system, I would like to try to solve it and leave a solution here for others (even if that is a very tiny minority of users using Arch...) :)

[ramiromagno]

In firefox with pkgdown 2.1.0 after installing the Arch Linux package: https://archlinux.org/packages/extra/any/otf-latinmodern-math/, sanity is restored!

Solution

To Archlinux folks out there:

yay -S otf-latinmodern-math

@hadley and @jayhesselberth: Thanks a lot for taking the time to help me out troubleshoot this.