old_contents: """Custom EvalException support
  
  Provides template engine HTML error formatters for the Template tab of
  EvalException.
  """
  try:
      import mako.exceptions
  except ImportError:
      mako = None
  
  __all__ = []
  
  # Legacy support for < 0.9.7 projects
  error_template = None
  
  def myghty_html_data(exc_value):
      """Format a Myghty exception as HTML"""
      if hasattr(exc_value, 'htmlformat'):
          return exc_value.htmlformat()[333:-14]
      if hasattr(exc_value, 'mtrace'):
          return exc_value.mtrace.htmlformat()[333:-14]
  
  template_error_formatters = [myghty_html_data]
  
  
  if mako:
      def mako_html_data(exc_value):
          """Format a Mako exception as HTML"""
          if isinstance(exc_value, (mako.exceptions.CompileException,
                                    mako.exceptions.SyntaxException)):
              return mako.exceptions.html_error_template().render(full=False,
                                                                  css=False)
      
      template_error_formatters.insert(0, mako_html_data)
  
new_contents: """Custom EvalException support
  
  Provides template engine HTML error formatters for the Template tab of
  EvalException.
  """
  try:
      import mako.exceptions
  except ImportError:
      mako = None
  
  __all__ = []
  
  # Legacy support for < 0.9.7 projects
  error_template = None
  
  def myghty_html_data(exc_value):
      """Format a Myghty exception as HTML"""
      if hasattr(exc_value, 'htmlformat'):
          return exc_value.htmlformat()[333:-14]
      if hasattr(exc_value, 'mtrace'):
          return exc_value.mtrace.htmlformat()[333:-14]
  
  template_error_formatters = [myghty_html_data]
  
  
  if mako:
      def mako_html_data(exc_value):
          """Format a Mako exception as HTML"""
          if isinstance(exc_value, (mako.exceptions.CompileException,
                                    mako.exceptions.SyntaxException)):
              return mako.exceptions.html_error_template().render(full=False,
                                                                  css=False)
      template_error_formatters.insert(0, mako_html_data)
  
subject: Tidy linebreaks.