History of b64url 1 change

In crates/hub/src/oidc.rs, lines 188–198 on d2c1d6a7d12edeaca968546dc2fde25068f3de0afaee844ff11d5afd514e43eb. 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 188,198:crates/hub/src/oidc.rs.