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).
Now make one with invisible/whitespace characters only. There’s
0DCR,0ALF,09tab,20space, different-width spaces, zero width modifiers and 256 variation selectors: 16 in the BMP (U+FE0x, or UTF-8EF B8 8x) plus 240 in the E-plane (U+E0100, orF3 A0 84 80up to U+E01EF, orF3 A0 87 AF).