use escape_json_string;
/// Windows hostile-test fix handoff Sec 2: the hostile-input proof used to live only in an
/// integration test that planted a directory whose name carried these exact bytes -- a double
/// quote, a backslash, and every C0 control are forbidden in a Win32 filename, so the directory
/// could never be created on that platform and the control never reached the escaper at all.
/// `escape_json_string` is a pure `&str -> String` function; proving it here needs no filesystem
/// and accepts input no filesystem would ever allow.