Give the Unstable Book a title

[frewsxcv]

Similar to rust-lang/rfcs#2669, but for the Unstable Book

Right now, titles look like: <title>emit_stack_sizes - </title>

To do this, we might just need to add a book.toml file in this directory

[gruberb]

I created a PR for this issue. The title I added is "The Rust Unstable Book". Or should it just be "The Unstable Book"?

[frewsxcv]

What you have looks great, thanks!

[frewsxcv]

Looks like there's still no title set after #59569 🤔

[gruberb]

Hmm... I'll check later when I am
home!

[gruberb]

@frewsxcv I double checked and it seems it's not being able to compile since there is no SUMMARY.md. When I run it locally the title is there, but the index is empty.

So I'll add a SUMMARY.md and create a new PR.

[frewsxcv]

It's been a while since I looked at this code, so not entirely sure how it all works, but I think the summary.md file is generated here: https://github.com/rust-lang/rust/tree/master/src/tools/unstable-book-gen/src

[gruberb]

I see. I took inspiration from the other books (like embedded). When I reproduce it for the unstable book, I get the title and everything.

So maybe I just have to add the book.toml to the unstable-book-gen folder. I never touched the books before so I am not sure why the unstable book behaves differently.