Add missing version guard and improve description
Add missing version guard and improve description

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