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Rollup merge of #82584 - tazjin:rustdoc-aria, r=GuillaumeGomez

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Add ARIA role to sidebar toggle in Rustdoc

This indicates that the div is an interactive element, and makes the sidebar toggle "clickable" in assistive technologies.

Example of Vimium after this change has been applied (see the issue mentioned below for a screenshot of before):

![Screenshot of Vimium link hints on a Rustdoc page, indicating that the sidebar toggle is clickable](https://user-images.githubusercontent.com/1552853/109384961-ff935400-78f8-11eb-8199-1d35181aeff0.png)

Fixes #82582
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Dylan DPC 2021-02-27 21:56:23 +01:00 committed by GitHub
commit a70be0bec9
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src/librustdoc/html/layout.rs
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@ -75,7 +75,7 @@ crate fn render<T: Print, S: Print>(
<![endif]-->\ <![endif]-->\
{before_content}\ {before_content}\
<nav class=\"sidebar\">\ <nav class=\"sidebar\">\
<div class=\"sidebar-menu\">&#9776;</div>\ <div class=\"sidebar-menu\" role=\"button\">&#9776;</div>\
{logo}\ {logo}\
{sidebar}\ {sidebar}\
</nav>\ </nav>\