(n\\n) (newline escape)
(n\\r) (carriage return escape)
(n\\t) (tab escape)
(n\\\\) (backslash escape)
(n\\() (open paren escape)
(n\\)) (close paren escape)
(n\\101) (octal A)
(n\\101\\102\\103) (multiple octal)
(line1\
line2) (line continuation)
(bare\\rcarriage) (line ending normalization test)