[issue14377] Modify serializer for xml.etree.ElementTree to allow forcing the use of long tag closing

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I think Éric means different spaces, spaces in empty tags (<empty /> vs <empty/>). I don't know what the standard says about this. It should a separated issue.

As for line continuations in docs, in all cases where they are occurred, a space used before a backslash for readability. I have reverted this change in 50606131a987.

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