Special characters not processed in double quoted string

[Wastack]

rfc-6.1.3:

Within a double-quoted string (enclosed within " "), a backslash
character introduces a representation of a special character, which
depends on the character that immediately follows the backslash:

\n      newline
\t      a tab character
\"      a double quote
\\      a single backslash

The backslash MUST NOT be followed by any other character.

Expected
the following double quoted string: a\nb\nc should be translated to:

a
b
c

Actual
The contents of the token is: a\nb\nc