Parser fails on strings with octal escape sequences

[miszczu]

Parser fails on following string (notice double backslash): "var x = '\071[90m%s';"

parser = Parser()
parser.parse("var x = '\071[90m%s';")
Illegal character "'" at 1:8 after LexToken(EQ,'=',1,6)
Illegal character '' at 1:9 after LexToken(EQ,'=',1,6)
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\Karol\venv\lib\site-packages\slimit\parser.py", line 93, in parse
return self.parser.parse(text, lexer=self.lexer, debug=debug)
File "C:\Users\Karol\venv\lib\site-packages\ply\yacc.py", line 265, in parse
return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
File "C:\Users\Karol\venv\lib\site-packages\ply\yacc.py", line 1047, in parse
opt_notracktok = self.errorfunc(errtoken)
File "C:\Users\Karol\venv\lib\site-packages\slimit\parser.py", line 116, in p_error
self._raise_syntax_error(token)
File "C:\Users\Karol\venv\lib\site-packages\slimit\parser.py", line 89, in _raise_syntax_error
self.lexer.prev_token, self.lexer.token())
SyntaxError: Unexpected token (ID, 'm') at 1:16 between LexToken(NUMBER,'90',1,14) and LexToken(MOD,'%',1,17)