History of dec 1 change

In crates/hub/src/mail.rs, lines 317–333 on v0.5.2. 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 317,333:crates/hub/src/mail.rs.