Rollup of 10 pull requests

[frewsxcv]

• Successful merges: Implement the illegal_floating_point_literal_pattern compat lint #41293, Use diagnostics for trace_macro instead of println #41520, Queryify more metadata #41766, Allow bare CR in ////-style comment. #41827, try to fix lvalue ops for real #41828, Bump cargo for rust-lang/cargo#4000 #41830, Update save-analysis deps and RLS submodule #41833, Update rustc-ux-guidelines #41836, Fixed argument inference for closures when coercing into 'fn' #41838, Fix typo in subst.rs #41842
• Failed merges:

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @arielb1 (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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[frewsxcv]

@bors r+ p=10

[bors]

📌 Commit a6465d3 has been approved by frewsxcv

[bors]

⌛ Testing commit a6465d3 with merge 530cbf5...

[bors]

💔 Test failed - status-appveyor