---input---
"Hello, Joe!"
"escaped \"quotes\""
"multi
 line
 string"
"escape sequences \u{0fa32} \" \\ \f \n \r \t"
"こんにちは"

---tokens---
'"Hello, Joe!"' Literal.String
'\n'          Text.Whitespace

'"escaped \\"quotes\\""' Literal.String
'\n'          Text.Whitespace

'"multi\n line\n string"' Literal.String
'\n'          Text.Whitespace

'"escape sequences \\u{0fa32} \\" \\\\ \\f \\n \\r \\t"' Literal.String
'\n'          Text.Whitespace

'"こんにちは"'     Literal.String
'\n'          Text.Whitespace
