Further clarified comment

Author: bvaughn

integration_tests/stack_trace/__tests__/custom_matcher.test.js

@@ -38,15 +38,16 @@ describe('Custom matcher', () => {
     }).toThrow();
   });
 
-  // This test fails due to an unrelated/unexpected error
-  // It will show a helpful stack trace though
   it('preserves error stack', () => {
     const foo = () => bar();
     const bar = () => baz();
     const baz = () => {
       throw Error('qux');
     };
 
+    // This expecation fails due to an error we throw (intentionally)
+    // The stack trace should point to the line that throws the error though,
+    // Not to the line that calls the matcher.
     expect(() => {
       foo();
     }).toCustomMatch('test');