Math in README.Rmd gets rendered as an image in README.md

[marcboschmatas]

As the title says, equations written with $$ $$ or $ $ get turned into an image when doing devtools::build_readme().

You can see the example in my repo, but it boils down to

$$
Y = X_0 \beta_1 + X_2\beta_2 + u
$$

being transformed into

![
Y = X\_0 \\beta\_1 + X\_2\\beta\_2 +
u
](https://latex.codecogs.com/png.image?%5Cdpi%7B110%7D&space;%5Cbg_white&space;%0AY%20%3D%20X_0%20%5Cbeta_1%20%2B%20X_2%5Cbeta_2%20%2B%20u%0A
"
Y = X_0 \\beta_1 + X_2\\beta_2 + u
")  

which is not an issue for Github readme, but when using devtools::build_site(), I guess it takes README.md as a source, which breaks the package site, like so.

This was not a problem when using pkgdown 2.0.9, but when I last updated it, it broke.

FWIW I am using devtools 2.4.5.900 and pkgdown 2.1.3.9000

I have tried manually rendering README.rmd
and changing the output to

---
output:
  md_document:
    variant: gfm
---

but the result has been the same.

Real example
README.Rmd
https://github.com/marcboschmatas/partialling.out/blob/main/README.Rmd

Readme.md
https://github.com/marcboschmatas/partialling.out/blob/main/README.md
https://raw.githubusercontent.com/marcboschmatas/partialling.out/refs/heads/main/README.md

Website
https://marcboschmatas.github.io/partialling.out/

[jennybc]

devtools::build_readme() hasn't been touched in 2 years. So if you're getting a new result in your website, the root cause will have to be elsewhere in the stack.

rmarkdown::render() is in charge of .Rmd to .md. Then pkgdown picks it up from there.

[jennybc]

I'm going to close this because I think whatever is causing you to get a different result is not something inside of devtools itself.