[issue1777134] minidom pretty xml output improvement

[Dávid Gábor Bodor]

Dávid Gábor Bodor <david.gabor.bodor at gmail.com> added the comment:

I would prefer to see this improvement as an option, rather than the default, because I believe that 'Issue4147' satisfies "pretty printing" better.

While leaving out whitespace from text-only elements is benefical for compatibility and roundtripping, there are certain situation where it hurts the prettyness of the xml really hard, an example:

<root>
    <element1>
        TextNode1
        <childnode2 />
        <childnode3 />
        TextNode4
    </element1>
    <element2>TextNode</element2>
</root>

vs. 

<root>
    <element1>TextNode1<childnode2 />
        <childnode3 />TextNode4</element1>
    <element2>TextNode</element2>
</root>

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nosy: +Dávid.Gábor.Bodor

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<http://bugs.python.org/issue1777134>
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