UAPI.15 requires: * No C0 Control Characters (`\x00-\x1f`) * No DEL character (`\x7f`) The following would be nice, but requires a `sed` implementation that is aware of UTF-8: `-e $'y/\x00-\x1f\x7f/␀-␟␡/'`. References: [0] https://uapi-group.org/specifications/specs/osc_context/#general-syntax