string.c: split with block
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
string.c: split with block
block is given, instead of returing the array. [Feature #4780]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e