x = "abc"
x = "abc\
123"
x = "\0\1\10\010\100"
x = "\"\""
x = "\a\b\t\n\f\r\v\\\'"
x = [==[
abc123
]==]
x = [[
abc
123
]]
x = [===[]===]
x = 'abc'
x = 'abc\
123'
x = '\0\1\10\010\100'
x = '\"\"'
x = '\a\b\t\n\f\r\v\\\''
x = "汉字\x80"
x = "汉字"
x = '汉字\x80'
x = '汉字'
x = '\u{0}\u{000}\u{10ffff}'
x = "\u{0}\u{000}\u{10ffff}"
x = [[\a\b\c\d\f"""''']]
x = "\x00\x01\xfe\xff"
x = '\x00\x01\xfe\xff'