Michael Sproul 5e1f8a8480 Update to Rust 1.59 and 2021 edition (#3038) ... ## Proposed Changes Lots of lint updates related to `flat_map`, `unwrap_or_else` and string patterns. I did a little more creative refactoring in the op pool, but otherwise followed Clippy's suggestions. ## Additional Info We need this PR to unblock CI.		2022-02-25 00:10:17 +00:00
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test.rs	Update to Rust 1.59 and 2021 edition (#3038)	2022-02-25 00:10:17 +00:00