History of DirBackend::open 2 changes

In crates/oxy-server/src/lib.rs, lines 433–442 on 16aa9e03d85bcc1285bb49bf98460ad57077aadefdfdb6fd3cc85b13e0965a2c. 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 433,442:crates/oxy-server/src/lib.rs.