$rfc7230:comment-quoted-pair-char-valid
[\u0028-\u0029\u005C]
[\x28-\x29\x5C]
Test a string: Show
Compare with: Show
Complemetary
[Notes] [RFC7230]
The set definition is contained in sets.json data file.
sets.json
U+0028
U+0029
U+005C