arrow function refactor test

tests/cases/fourslash/refactorAddOrRemoveBracesToArrowFunctionBody.ts

@@ -0,0 +1,7 @@
+/// <reference path='fourslash.ts' />
+
+//// const a = (a: number) => { return/*a*//*b*/ a; };
+
+// an invoked refactor request for a cursor in the body should return a refactor
+goTo.select("a", "b");
+verify.refactorAvailableForTriggerReason("invoked","Add or remove braces in an arrow function", "Remove braces from arrow function");