History of main 1 change

In crates/flow/build.rs, lines 4–20 on 1daca0b6bb8c1eb3e887aac0a920eb826064cb643ec01d140663692be7a01ee0. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 4,20:crates/flow/build.rs.