[issue1433694] normalize function in minidom unlinks empty child nodes

[Malte Helmert]

Malte Helmert added the comment:

OK, I think I found the root cause. Node.normalize regenerates the list
of children L with their previousSibling/nextSibling references from
scratch; however, it fails to set the nextSibling reference for the very
last element of L to None at the end. This is necessary iff the last
node in the original child list is removed. The attached patch should
solve the problem.

In cases like this, should I also add a regression test?

Added file: http://bugs.python.org/file9345/MINIDOM-PATCH

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