old_contents: 'use babel'
  
  import React from 'react-for-atom'
  
  export default React.createClass({
  
    propTypes: {
      width: React.PropTypes.number,
      title: React.PropTypes.string
    },
  
    render () {
      return (
        <th style={{width: this.props.width}}>
          {this.props.title}
        </th>
      )
    }
  
  })
  
new_contents: 'use babel'
  
  import React from 'react-for-atom'
  
  export default React.createClass({
  
    propTypes: {
      width: React.PropTypes.string,
      title: React.PropTypes.string
    },
  
    render () {
      return (
        <th style={{width: this.props.width}}>
          {this.props.title}
        </th>
      )
    }
  
  })
  
subject: Fix propType warning