History of sign_challenge 2 changes

In src/cli/identity.rs, lines 750–771 on a39754d02c58821ead87a27f98ce909521dff56945c5b04f233247201f90fe32. 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 750,771:src/cli/identity.rs.