History of b64url 1 change

In crates/hub/src/oidc.rs, lines 188–198 on c987c86513df8e00d726ae32c83c2479e950290ab40e2228992888df7938d2fc. 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.