If consequent is a block statement, treat as trailing comment

tests/flow/refinements/__snapshots__/jsfmt.spec.js.snap

@@ -2571,8 +2571,7 @@ type Breakfast = Apple | Orange | Broccoli | Carrot;
 function bar(x: Breakfast) {
   if (x.kind === "Fruit") {
     (x.taste: "Good");
-  }
-  // error, Apple.taste = Bad
+  } // error, Apple.taste = Bad
   else (x.raw: "No"); // error, Carrot.raw = Maybe
 }