old_contents: 'use strict'
  
  
  export default function ToggleDrawerReducer(previous = false, action) {
  
    if (action.type === 'TOGGLE_SIDEBAR') {
      return !previous
    }
  
    return previous
  }
  
new_contents: 'use strict'
  
  export default function ToggleDrawerReducer(previous = false, action) {
  
    if (action.type === 'TOGGLE_SIDEBAR') {
      return !previous
    }
  
    return previous
  }
  
subject: remove whitespace