const REDACTED_PLACEHOLDER: &str = "\u{2022}\u{2022}\u{2022}\u{2022}\u{2022}\u{2022}\u{2022}\u{2022}";Expand description
Placeholder written in place of a redacted value. Any renderer code that
merely checks “is a key set” (e.g. MaskedKeyField’s locked-state gate)
keeps working unchanged; nothing should ever display this string as if it
were the real value.