EscapeHistoryCommand escape history command.

EscapeInput escape special characters such as SOH, ENQ and DEL in user input.

EscapeTabCompletion escape tab completion.

HasDownArrowSuffix test whether input has down arrow suffix.

HasUpArrowSuffix test whether input has up arrow suffix.

IsBell test whether input is Bell.

IsCR test whether input is CR.

IsTab test whether input is Tab.

NewInput return an initialized *Input.

DownArrow denotes down arrow.

UpArrow denotes up arrow.

Input denotes user input from terminal.