cannot type function argument in parser as it receives unicode subtypes

Cython/Compiler/Parsing.pxd

@@ -68,7 +68,7 @@ cdef p_opt_string_literal(PyrexScanner s, required_type=*)
 cdef bint check_for_non_ascii_characters(unicode string)
 @cython.locals(systr=unicode, is_python3_source=bint, is_raw=bint)
 cdef p_string_literal(PyrexScanner s, kind_override=*)
-cdef _append_escape_sequence(kind, builder, unicode escape_sequence, PyrexScanner s)
+cdef _append_escape_sequence(kind, builder, escape_sequence, PyrexScanner s)
 @cython.locals(i=Py_ssize_t, size=Py_ssize_t, c=Py_UCS4)
 cdef list p_f_string(PyrexScanner s, unicode_value, pos, bint is_raw)
 @cython.locals(i=Py_ssize_t, size=Py_ssize_t, c=Py_UCS4, quote_char=Py_UCS4, NO_CHAR=Py_UCS4)