Use the block of raise_error in Encoding::Converter#last_error spec
Use the block of raise_error in Encoding::Converter#last_error spec

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