fix: [#1151] Skips svg elements when innerText is used

[karpiuMG]

• fix: [svg element innertText is undefined #1151] Add newline if it's a block/flex element and there's more content coming after

for skipping svg element a change is needed for recognizing tag names as HTML Parser parse svg elements in a way that svg tagName is lowercase - which shouldn't be the case for HTML document context
ref. https://developer.mozilla.org/en-US/docs/Web/API/Element/tagName#value

I leave it to you @capricorn86 - maybe you could add the change in your DOM Parsing PR #1666

close #1151

[capricorn86]

Suggested change

	// TODO: svg element should return an uppercase SVG tag in html document context
	// ref. https://developer.mozilla.org/en-US/docs/Web/API/Element/tagName#value

SVG elements in the SVG namespace should actually be in lower case (as it is in an XML namespace).

This can easily be tested in the browser:

     var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
     
     document.body.appendChild(svg);
     
     // Outputs "svg"
     console.log(svg.tagName);

[capricorn86]

Thank you for your contribution @karpiuMG ⭐

I found a small thing.

[capricorn86]

I made a performance fix and removed the comment 🙂