old_contents: import bleach
  
  ALLOWED_TAGS = bleach.ALLOWED_TAGS + [
      'div', 'span', 's', 'u', 'img'
  ]
  
  ALLOWED_STYLES = bleach.ALLOWED_STYLES + [
      'font-weight', 'font-family', 'font-size'
  ]
  
  ALLOWED_ATTRIBUTES = bleach.ALLOWED_ATTRIBUTES
  ALLOWED_ATTRIBUTES['*'] = ['style']
new_contents: import bleach
  
  ALLOWED_TAGS = bleach.ALLOWED_TAGS + [
      'div', 'span', 's', 'u', 'img', 'br'
  ]
  
  ALLOWED_STYLES = bleach.ALLOWED_STYLES + [
      'font-weight', 'font-family', 'font-size'
  ]
  
  ALLOWED_ATTRIBUTES = bleach.ALLOWED_ATTRIBUTES
  ALLOWED_ATTRIBUTES['*'] = ['style']
  
subject: Add line break to allowed HTML tags