@gloriouscow@oldbytes.space Now make one with invisible/whitespace characters only. There's `0D` CR, `0A` LF, `09` tab, `20` space, different-width spaces, zero width modifiers and 256 variation selectors: 16 in the BMP (U+FE0x, or UTF-8 `EF B8 8x`) plus 240 in the E-plane (U+E0100, or `F3 A0 84 80` up to U+E01EF, or `F3 A0 87 AF`).