NON_PRINTABLE_CHARACTER_PATTERN
The pattern of an ill-formed functor for a Struct containing
non-printable characters (e.g.
\n,\r,\t)other characters which must be escaped (e.g.
",',\)
The pattern of an ill-formed functor for a Struct containing
non-printable characters (e.g. \n, \r, \t)
other characters which must be escaped (e.g. ", ', \)