Issue #6696 has been updated by madeofcode (Mark Dodwell). Sorry, somehow this ticket subject line got truncated. Newline paste fail. ---------------------------------------- Bug #6696: [PATCH] https://bugs.ruby-lang.org/issues/6696#change-27791 Author: madeofcode (Mark Dodwell) Status: Open Priority: Normal Assignee: Category: Target version: 1.9.3 ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.2] ERB::Util.url_encode is escaping tilde (~) where it should not according to the RFC. This fixes that behaviour so that it now correctly avoids escaping all unreserved characters as per RFC 3986, Section 2.3: http://tools.ietf.org/html/rfc3986#section-2.3 Fwiw., this is also how the Perl implementation works: http://search.cpan.org/dist/URI/URI/Escape.pm#DESCRIPTION I opened this issue originally on Github, but I think it warrants further discussion, so re-opening here. -- http://bugs.ruby-lang.org/