History of sign_challenge 2 changes

In src/cli/identity.rs, lines 737–758 on c2d790f9fa9545028cb6ea29223212bdf4fab3e4719e6f942f60c21896917ac3. 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.