text: //initialState.fuelSavings
  // export const todos = (state = [], action) => {
  export default function todoSavingsReducer(state = [], action) {
      switch (action.type) {
        case 'ADD_TODO':
          return [
            ...state,
            {
              id: action.id,
              text: action.text,
              completed: false
            }
          ];
          default:
          return state;
      }
  }