hpricot：Hpricot::Container::Trav#following_siblings

everyday Ruby 
>> require "hpricot"
=> true
>> doc = Hpricot('<p>foo1</p><p>foo2</p>')
=> #<Hpricot::Doc {elem <p> "foo1" </p>} {elem <p> "foo2" </p>}>
>> doc.at('p').following_siblings
=> #<Hpricot::Elements[{elem <p> "foo2" </p>}]>
>> doc = Hpricot('<p>foo1</p><p>foo2</p><p>foo3</p>')
=> #<Hpricot::Doc {elem <p> "foo1" </p>} {elem <p> "foo2" </p>} {elem <p> "foo3" </p>}>
>> doc.at('p').following_siblings
=> #<Hpricot::Elements[{elem <p> "foo2" </p>}, {elem <p> "foo3" </p>}]>
>> doc = Hpricot('<p><b>foo1</b></p><p>foo2</p><p>foo3</p>')
=> #<Hpricot::Doc {elem <p> {elem <b> "foo1" </b>} </p>} {elem <p> "foo2" </p>} {elem <p> "foo3" </p>}>
>> doc.at('b')
=> {elem <b> "foo1" </b>}
>> doc.at('b').following_siblings
=> #<Hpricot::Elements[]>
>> doc = Hpricot('<p><b>foo1</b><b>hoge</b></p><p>foo2</p><p>foo3</p>')
=> #<Hpricot::Doc {elem <p> {elem <b> "foo1" </b>} {elem <b> "hoge" </b>} </p>} {elem <p> "foo2" </p>} {elem <p> "foo3" </p>}>
>> doc.at('b').following_siblings
=> #<Hpricot::Elements[{elem <b> "hoge" </b>}]>