XML notation diff does not parse correctly.

[Xilophor]

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Describe the bug

In XML formatting, git removals ([!code --]) are not displayed correctly.

Technical Problem:

In the transformerNotationDiff transformer, removals are notated with [!code --] inside of a comment. In XML, comments cannot have -- in them due to compatibility reasons, as described here:

https://www.w3.org/TR/REC-xml/#sec-comments

[Definition: Comments may appear anywhere in a document outside other markup; in addition, they may appear within the document type declaration at places allowed by the grammar. They are not part of the document's character data; an XML processor MAY, but need not, make it possible for an application to retrieve the text of comments. For compatibility, the string " -- " (double-hyphen) MUST NOT occur within comments.] Parameter entity references MUST NOT be recognized within comments.

Reproduction

<Reference Include="Assembly-CSharp" HintPath="...\Assembly-CSharp.dll" /> <!-- [!code --] -->

Contributes

• I am willing to submit a PR to fix this issue
• I am willing to submit a PR with failing tests