Rollup of 4 pull requests

[Dylan-DPC-zz]

Successful merges:

• resolve: lifetimes.rs -> late/lifetimes.rs #69439 (resolve: lifetimes.rs -> late/lifetimes.rs)
• update llvm to silence gcc 9 warnings #69473 (update llvm to silence gcc 9 warnings)
• clarify operator precedence #69479 (clarify operator precedence)
• Clean up E0373 explanation #69480 (Clean up E0373 explanation)

Failed merges:

• use char instead of &str for single char patterns #69481 (use char instead of &str for single char patterns)
• use find(x) instead of filter(x).next() #69496 (use find(x) instead of filter(x).next())

r? @ghost

[Dylan-DPC-zz]

@bors r+ rollup=never p=4

[bors]

📌 Commit 7f11fd0 has been approved by Dylan-DPC

[bors]

⌛ Testing commit 7f11fd0 with merge 36156c9...

[bors]

💥 Test timed out

[JohnTitor]

Closing in favor of new rollup.