Correct DOMDocument constructor in test

[guilliamxavier]

http://php.net/manual/en/domdocument.construct.php reads:

public DOMDocument::__construct ([ string $version [, string $encoding ]] )

so new \DOMDocument('UTF-8') is incorrect, should be new \DOMDocument('1.0', 'UTF-8'),

but the top user note explains:

The constuctor arguments are useful if you want to build a new document using createElement, appendChild etc.

By contrast, these arguments are overriden as soon as you load a document from source by calling load() or loadXML().

• If the source contains an XML declaration specifying an encoding, that encoding is used.
• If the XML declaration does not specify an encoding, or if the source does not contain a declaration at all, UTF-8 is assumed.

This behaviour applies no matter what you declared when you called new DOMDocument().

so here the argument(s) should rather simply be left out.

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The additional CS fixes make it also applicable to master as is.

[Majkl578]

Thanks @guilliamxavier. 🚢