Add spec for String#split with a block (feature 4780)
Add spec for String#split with a block (feature 4780)

eregon/rubyspec,nobu/rubyspec,nobu/rubyspec,ruby/rubyspec,ruby/spec,ruby/spec,ruby/spec,nobu/rubyspec,eregon/rubyspec,eregon/rubyspec,ruby/rubyspec