History of sign_challenge 2 changes

In src/cli/identity.rs, lines 837–858 on f0a517d282376d51a83b818987835d0b01e0c63fc120873c8b71304a8f7e1308. 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 837,858:src/cli/identity.rs.