ACL is not url encoded in akamai/edgeauth/edgeauth.py even if self.escape_early was set to true

Dear Akamai developer, 

I nodicted that in the code akamai/edgeauth/edgeauth.py , ACL is not url encoded in akamai/edgeauth/edgeauth.py even if self.escape_early was set to true when generate the hmac

Is this by intention or by mistake?

if by intention , this means I should never  send the url encoded acl to the end user, correct?