add test

Author: aozgaa

tests/cases/fourslash/formatOnEnterInComment.ts

@@ -0,0 +1,14 @@
+/// <reference path="fourslash.ts"/>
+
+////   /**
+////    * /*1*/
+////    */
+
+goTo.marker("1");
+edit.insertLine("");
+verify.currentFileContentIs(
+`  /**
+   * 
+
+   */`
+);