fix nested comments case

Author: dxu

formatTest/unit_tests/input/comments.re

@@ -2,11 +2,15 @@
  * Multiline comment
  */
 
+/*
+
+
+ */
+
 /*
  * Multiline comment with a // single line comment
  */
 // Single line comment
-// Single line comment with a multiline /* starting
 let testPostComment = "";
 // let commentedCode = "";
 
@@ -42,7 +46,7 @@ let x = {
 // /* this is a valid nested comment*/ this is a valid comment
 
 
-// valid /* this is a valid comment
+// valid /* this is a valid comment */
 
 let z = 10;