lib/set.rb: Enable frozen_string_literal.
lib/set.rb: Move << out of the begin block that ensures pop.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52593 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
lib/set.rb: Enable frozen_string_literal.
lib/set.rb: Move << out of the begin block that ensures pop.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52593 b2dd03c8-39d4-4d8f-98ff-823fe69b080e