History of signature_line 1 change

In src/main.rs, lines 79–85 on 1983686fb7a7f984625c2b2185581f0b95abed59946c2f5fc097bf07f18fbeaf. 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 79,85:src/main.rs.