History of help_tests::walk 1 change

In src/cli/mod.rs, lines 1531–1548 on f3811eb20bea7aae11743297532b89af8e428178eccf4531b15df23dfee3f1b9. 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 1531,1548:src/cli/mod.rs.