xml.dom.minidom uses names from superseded drafts of DOM Level 3

Several public attributes and methods of xml.dom.minidom come from working drafts of DOM Level 3, and were renamed before the Recommendation was published in 2004. The code says so itself:

# DOM Level 3 attributes, based on the 22 Oct 2002 draft
# DOM Level 3 (WD 9 April 2002)

Document.errorHandler is from the same drafts; in the Recommendation it became a parameter of domConfig.

None of these names are documented, so nothing tells a user that they are neither DOM Level 1/2 (which xml.dom documents) nor DOM Level 3 (which minidom does not claim, see gh-50348).

Adding the specified names and keeping the old ones as aliases breaks nothing, and lets the documented API match the specification.

Linked PRs

• gh-156696

Commencez par le point d’entrée xml.dom.minidom et examinez les attributs et méthodes publics listés dans l’issue, ainsi que leurs commentaires DOM Level 3. Comparez chaque nom actuel au nom spécifié dans la Recommendation ; c’est terminé lorsque les noms spécifiés sont disponibles comme alias sans casser les anciens noms, avec une couverture appropriée dans les tests existants.