History of run 4 changes

In src/main.rs, lines 131–367 on 5e388efbde57a5b8196f8470e439108a0eb098bc35002795df862b6910a352f0. 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 131,367:src/main.rs.