- s
- string to encode
- allow
- set of additional characters to allow in the encoded form, null if no characters should be skipped
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Encodes characters in the given string as '%'-escaped octets using the UTF-8 scheme. Leaves letters ("A-Z", "a-z"), numbers ("0-9"), and unreserved characters ("_-!.~'()*") intact. Encodes all other characters with the exception of those specified in the allow argument.