History of help_tests::walk 1 change

In src/cli/mod.rs, lines 1216–1233 on fd280228bdc252bb48aecdfb07489c7f3fbc5304362888c85a8f22b400add118. 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 1216,1233:src/cli/mod.rs.