message: Support ForOfStatement with .await boolean property.
diff: @@ -933,24 +933,23 @@ function genericPrintNoParens(path, options, print) {
  ]);
  case "ForOfStatement":
  - return concat([
  - "for (",
  - path.call(print, "left"),
  - " of ",
  - path.call(print, "right"),
  - ")",
  - adjustClause(path.call(print, "body"), options)
  - ]);
  -
  case "ForAwaitStatement":
  - return concat([
  - "for await (",
  + parts.push("for ");
  +
  + if (n.await || n.type === "ForAwaitStatement") {
  + parts.push("await ");
  + }
  +
  + parts.push(
  + "(",
  path.call(print, "left"),
  " of ",
  path.call(print, "right"),
  ")",
  adjustClause(path.call(print, "body"), options)
  - ]);
  + );
  +
  + return concat(parts);
  case "DoWhileStatement":
  var doBody = concat([
  