.<<	Readline::HISTORY.<<
.[]	Readline::HISTORY.[]
.[]=	Readline::HISTORY.[]=
.delete_at	Readline::HISTORY.delete_at
.each	Readline::HISTORY.each
.empty?	Readline::HISTORY.empty?
.length	Readline::HISTORY.length
.pop	Readline::HISTORY.pop
.push	Readline::HISTORY.push
.shift	Readline::HISTORY.shift
.to_s	Readline::HISTORY.to_s
