old_contents: import React from 'react';
  import PropTypes from 'prop-types';
  import * as Routes from '../helpers/Routes';
  
  const whitePixel = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
  
  // Pure UI component for displaying a student photo
  export default class StudentPhoto extends React.Component {
  
    onError(e) {
      e.target.src = whitePixel;
    }
  
    altText() {
      const {student} = this.props;
      return `Student photo for ${student.first_name} ${student.last_name}`;
    }
  
    render() {
      const {student, height, style} = this.props;
  
      return (
        <img id='student-photo'
             style={style}
             src={Routes.studentPhoto(student.id)}
             height={height}
             alt={this.altText}
             onError={this.onError}
          />
      );
    }
  }
  
  StudentPhoto.propTypes = {
    student: PropTypes.object.isRequired,
    height: PropTypes.number.isRequired,
    style: PropTypes.object,
  };
  
  
new_contents: import React from 'react';
  import PropTypes from 'prop-types';
  import * as Routes from '../helpers/Routes';
  
  const whitePixel = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
  
  // Pure UI component for displaying a student photo
  export default class StudentPhoto extends React.Component {
  
    onError(e) {
      e.target.src = whitePixel;
    }
  
    altText() {
      const {student} = this.props;
      return `Student photo for ${student.first_name} ${student.last_name}`;
    }
  
    render() {
      const {student, height, style} = this.props;
  
      return (
        <img id='student-photo'
             style={style}
             src={Routes.studentPhoto(student.id)}
             height={height}
             alt={this.altText()}
             onError={this.onError}
          />
      );
    }
  }
  
  StudentPhoto.propTypes = {
    student: PropTypes.object.isRequired,
    height: PropTypes.number.isRequired,
    style: PropTypes.object,
  };
  
  
subject: Fix missing func call