5868e28537
cleanup: `Span::new` -> `Span::with_lo` Extracted from https://github.com/rust-lang/rust/pull/84373 as suggested in https://github.com/rust-lang/rust/pull/84373#issuecomment-857773867. It turned out less useful then I expected, but anyway. r? `@cjgillot` `@bors` rollup