Use proper quotes in string literal type annotation

Summary: This stores `raw` now so use it.

Reviewed By: tmikov

Differential Revision: D33072071

fbshipit-source-id: d35aeacf81848625aea7c17ef85e0b3cd0dc6cb8

Author: avp

unsupported/juno/crates/juno/src/gen_js.rs

@@ -2011,11 +2011,12 @@ impl<W: Write> GenJS<W> {
             Node::StringLiteralTypeAnnotation(StringLiteralTypeAnnotation {
                 metadata: _,
                 value,
-                raw: _,
+                raw,
             }) => {
-                out_token!(self, node, "\"");
-                self.print_escaped_string_literal(value, '"');
-                out!(self, "\"");
+                let quote = raw.str[0] as u8 as char;
+                out_token!(self, node, "{}", quote);
+                self.print_escaped_string_literal(value, quote);
+                out!(self, "{}", quote);
             }
             Node::NumberLiteralTypeAnnotation(NumberLiteralTypeAnnotation {
                 metadata: _,

unsupported/juno/crates/juno/tests/gen_js/mod.rs

@@ -474,6 +474,7 @@ fn test_types() {
     test_roundtrip_flow("type A = ?(number | string)");
     test_roundtrip_flow("type A = string");
     test_roundtrip_flow("type A = \"foo\"");
+    test_roundtrip_flow("type A = 'foo'");
     test_roundtrip_flow("type A = 3");
     test_roundtrip_flow("type A = boolean");
     test_roundtrip_flow("type A = true | false");