docs: def line_content_counts_as_uncovered_manual(content: str) -> bool:
      """
      Args:
          content: A line with indentation and tail comments/space removed.
  
      Returns:
          Whether the line could be included in the coverage report.
      """
      # Omit empty lines.
      if not content:
          return False
  
      # Omit declarations.
      for keyword in ['def', 'class']:
          if content.startswith(keyword) and content.endswith(':'):
              return False
  
      # TODO: multiline comments, multiline strings, etc, etc.
      return True