History of sign_challenge 2 changes

In src/cli/identity.rs, lines 737–758 on 03571027793ef0d317e42e6f329d823634af804c934dd34f396feb9fdbbc22ae. 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.