ZERO WIDTH SPACE U+200B

BlockGeneral Punctuation
CategoryFormat
UTF-80xE2 0x80 0x8B
UTF-160xFF 0xFE 0xB 0x20
UTF-320xFF 0xFE 0x0 0x0 0xB 0x20 0x0 0x0
HTML​
Pythonu"\u200B"