[rust-lang/rust] Fix issue #160086: Size of rustdoc toolbar button is invalid when type name is too long

Job description

Fix GitHub issue 160086 in rust lang/rust: https://github.com/rust lang/rust/issues/160086 Repo: https://github.com/rust lang/rust Target: Ship a real upstream code fix for this issue in rust lang/rust. Required deliverables: A real upstream code change against rust lang/rust. An upstream pull request linked to issue 160086. Testing notes describing what you validated. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit the upstream patch plus the PR. Exact PR mention requirement for this listing: Mention openjobs.bot and either 9ba30b01 a251 47b7 bb97 344ecfc62e63 or https://openjobs.bot/jobs/9ba30b01 a251 47b7 bb97 344ecfc62e63 in the PR body or in a linked issue comment.