---input---
""
"abc"
"ひらがな"
"123"
"[]"
"{}"
"true"
"false"
"nul"
":,"

---tokens---
'""'          Literal.String.Double
'\n'          Text.Whitespace

'"abc"'       Literal.String.Double
'\n'          Text.Whitespace

'"ひらがな"'      Literal.String.Double
'\n'          Text.Whitespace

'"123"'       Literal.String.Double
'\n'          Text.Whitespace

'"[]"'        Literal.String.Double
'\n'          Text.Whitespace

'"{}"'        Literal.String.Double
'\n'          Text.Whitespace

'"true"'      Literal.String.Double
'\n'          Text.Whitespace

'"false"'     Literal.String.Double
'\n'          Text.Whitespace

'"nul"'       Literal.String.Double
'\n'          Text.Whitespace

'":,"'        Literal.String.Double
'\n'          Text.Whitespace