History of sign_challenge 2 changes

In src/cli/identity.rs, lines 737–758 on 0c15e46784795a7e5b0f50ef048d027f89d2a67d917f82ed2d505135f4064771. 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.