docs: def are_equal_elements(a_el, b_el):
      """Normalize and compare ElementTrees for equality.
  
      Args:
        a_el: ElementTree
        b_el: ElementTree
          ElementTrees to compare for equality.
  
      Returns:
        bool: ``True`` if the ElementTrees are semantically equivalent.
  
      """
      if a_el.tagName != b_el.tagName:
          return False
      if sorted(a_el.attributes.items()) != sorted(b_el.attributes.items()):
          return False
      if len(a_el.childNodes) != len(b_el.childNodes):
          return False
      for a_child_el, b_child_el in zip(a_el.childNodes, b_el.childNodes):
          if a_child_el.nodeType != b_child_el.nodeType:
              return False
          if (
              a_child_el.nodeType == a_child_el.TEXT_NODE
              and a_child_el.data != b_child_el.data
          ):
              return False
          if a_child_el.nodeType == a_child_el.ELEMENT_NODE and not are_equal_elements(
              a_child_el, b_child_el
          ):
              return False
      return True