Your Go-To Regular Expression Reference: Unicode Part I

Unicode CharacterMatchesChar Code \u0000 (or \u{0000} if the unicode flag is set)NULL0 \u0001 (or \u{0001} if the unicode flag is set)SOH (start of heading)1 \u0002 (or \u{0002} if the unicode flag is set)STX (start of text)2 \u0003 (or \u{0003...