<-> doesn't show up in rendered sites

[DavisVaughan]

Reported here
tidyverse/dplyr#6769

Where you can see that the dplyr pkgdown site has a vignette title like dplyr <-> base R but the <-> doesn't show up on the rendered page. It does seem to show up when looking at the title of the article in the nav bar though.

I think I'm remembering that <-> is some kind of comment in HTML? So maybe this can't be worked around? But it would be good to confirm

[maelle]

Fun edge case. 😅

The problem happens at this stage

pkgdown/R/build-articles.R

Line 328 in c354aa7

render_page(pkg, name, data, path, depth = depth, quiet = TRUE)

What works

• changing {{{pagetitle}}} to {{pagetitle}} but I tried it randomly so probably not a good solution.
• adding data[["pagetitle"]] <- escape_html(data[["pagetitle"]]). That sounds more promising, and might need to be applied in more places. I don't have time to explore more right now, sorry.

In the meantime you could add escaping in your vignette source, but then if escaping is added to pkgdown later, your title would be completely garbled.

[hadley]

I reviewed all the places we set the pagetitle and they all seem to be raw text. Even for reference topics which already does paste0(strip_html_tags(out$title), " \u2014 ", out$name). So I think the right move is to escape in the template.