code area isn't scrollable on mobile (rustdoc)

[cynecx]

This code area isn't scrollable (horizontal scrolling):

https://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html

It seems like contain: layout on the <details> caused this. This got introduced here #102253 (cc @jsha).

We can make this work by making the parent <code> behave like a block but still being inline (inline-block).

Something like this should fix this:

pre > code {
    display: inline-block;
}

However, I am not quite sure whether this offsets the improvements made in #102253.

[jsha]

Thanks for reporting this! We should definitely fix it. I'm not sure if inline-block is the right way to fix it, but I can poke at it and see what I find.

[GuillaumeGomez]

The bug was also present on desktop. The PR to fix it is #106690.