History of help_tests::walk 1 change

In src/cli/mod.rs, lines 1636–1653 on cea2e2f860c53c99e442fdcd5539db3ff130c788d39f42aff5df5612d1f07c38. 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 1636,1653:src/cli/mod.rs.