cgi/escape: Optimize CGI.unescape
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
cgi/escape: Optimize CGI.unescape
for ASCII-compatible encodings. [Fix GH-1250]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e