History of signature_line 2 changes

In src/main.rs, lines 106–114 on 5b9c6ad45f6e6baa0f84f725b4f001cb5f4e08cb5b63a3c023e2df24c9dc9d77. 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 106,114:src/main.rs.