Implement Enumerable#sum
enum.c (enum_sum): Implement Enumerable#sum.
test/ruby/test_enum.rb (test_sum): Test sum for Enumerable.
test/ruby/test_hash.rb (test_sum): Test sum for Hash.
test/ruby/test_range.rb (test_sum): Test sum for Range.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55032 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Implement Enumerable#sum
enum.c (enum_sum): Implement Enumerable#sum.
test/ruby/test_enum.rb (test_sum): Test sum for Enumerable.
test/ruby/test_hash.rb (test_sum): Test sum for Hash.
test/ruby/test_range.rb (test_sum): Test sum for Range.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55032 b2dd03c8-39d4-4d8f-98ff-823fe69b080e