librustdoc: Use correct heading levels. Closes #89309 This fixes the `<h#>` header tags throughout the docs to reflect a semantic hierarchy. - I ran a script to manually check that we don't have any files with multiple `<h1>` tags. - Also checked that we never incorrectly nest e.g. a `<h2>` under an `<h3>`. - I also spot-checked a bunch of pages (`trait.Read`, `enum.Ordering`, `primitive.isize`, `trait.Iterator`). |
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| build.rs | ||
| Cargo.toml | ||
| main.rs | ||