History of sign_challenge 2 changes

In src/cli/identity.rs, lines 737–758 on fddf64baa3d2b8c8efd78df0677341036711292c17775f4c02499546736c037e. 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 737,758:src/cli/identity.rs.