History of sign_challenge 2 changes

In src/cli/identity.rs, lines 1001–1022 on 232aabb5452d64b37861ebe61aaabacb012e4ae041f141bc0a51e00d4c8986a5. 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 1001,1022:src/cli/identity.rs.