old_contents: import {SET_ENABLE_SPARK} from "../../constants/Roles";
  import {Map} from "immutable";
  
  const initialState = Map({
    roles: [{
      role: "spark",
      sudo: "noe"
    }],
    nginx: {}
  });
  
  export default function spark(state = initialState, action) {
    switch (action.type) {
      case SET_ENABLE_SPARK:
      {
        return state.set("enable_spark", action.value.get("enable_spark"));
      }
      default:
        return state;
    }
  }
  
new_contents: import {SET_ENABLE_SPARK} from "../../constants/Roles";
  import {Map} from "immutable";
  
  const initialState = Map({
    roles: [{
      role: "spark",
      sudo: "no"
    }],
    nginx: {}
  });
  
  export default function spark(state = initialState, action) {
    switch (action.type) {
      case SET_ENABLE_SPARK:
      {
        return state.set("enable_spark", action.value.get("enable_spark"));
      }
      default:
        return state;
    }
  }
  
subject: Fix typo