pub const INPUT_HELP: &str = "\n\u{1b}[1mA natural-language expression\u{1b}[22m like \u{1b}[4m\"next Friday at 9:30\"\u{1b}[24m.\nIf omitted and STDIN is a pipe, reads from it. If omitted in a terminal, defaults to \u{1b}[1m\"now\"\u{1b}[22m.\n\nSupports \u{1b}[1m@<epoch>\u{1b}[22m syntax for Unix timestamps (e.g. \u{1b}[1m@1719244800\u{1b}[22m).\nSmart precision: seconds, milliseconds, microseconds, and nanoseconds auto-detected.\n\nSupports arithmetic (\u{1b}[1m\"tomorrow + 3 hours\"\u{1b}[22m), periods (\u{1b}[1m\"this week\"\u{1b}[22m), and boundaries (\u{1b}[1m\"eod\"\u{1b}[22m, \u{1b}[1m\"sow\"\u{1b}[22m).\n";Expand description
Help text for the positional input argument.