Allow to customize XML declaration header when writing ElementTree output

[pprossi]

Feature or enhancement

Proposal:

At the moment it is hardcoded with single quotes and differs from examples in the documentation.

cpython/Lib/xml/etree/ElementTree.py

Line 722 in 5a584c8

write("<?xml version='1.0' encoding='%s'?>\n" % (

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-128136: Possibility to customize hardcoded xml declaration #128095

[picnixz]

Closing as not planned for now as per #128095 (comment).