title: Combine multiple sagas
body: <p>For combine multiple sagas I used </p>
  
  <pre><code>function* mySaga() {
      yield takeEvery("USER_FETCH_REQUESTED", fetchUser);
      yield takeEvery('INCREMENT_ASYNC', incrementAsync);
  }
  </code></pre>
  
  <p>but I saw other design pattern : </p>
  
  <pre><code>function* mySaga() {
  
      yield all([
          yield takeEvery("USER_FETCH_REQUESTED", fetchUser),
          yield takeEvery('INCREMENT_ASYNC', incrementAsync)
      ]);
  
  }
  </code></pre>
  
  <p>What diffferences between  ? Where we can use  yield all ? </p>