A string is a sequence of characters. A string is written
by enclosing the characters with a doublequote ("). Some
special characters must be preceded by a backslash, these
include doublequote and backslash. The technique of marking
special characters are called escaping and backslash it self
is called an escape character.
Examples of literal strings:
500 Can't connect to 127.0.0.1:8778 (connect: Connection refused)