Markdown Highlighting: Uppercase and Unknown Tags

[karlhorky]

Note: This has been copied to microsoft/vscode-markdown-tm-grammar#49 as per #79119 (comment)

The Markdown syntax highlighting grammar doesn't recognize valid uppercase HTML tags or unknown tags (such as web components):

Compare that with the HTML grammar highlighting, which would be the preferable output:

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Background: In @silvenon's MDX extension, I would like React component highlighting to work properly inline (see silvenon/vscode-mdx#9).

While this wouldn't get us all of the way there, it would at least be a step in the right direction (and would also benefit normal Markdown users).

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Potentially related (HTML Textmate Grammar fix for custom HTML tags):

textmate/html.tmbundle#92
cfc2a22

[iansan5653]

This may belong in https://github.com/microsoft/vscode-markdown-tm-grammar

[karlhorky]

@iansan5653 Thanks! I've copied it to microsoft/vscode-markdown-tm-grammar#49. Will close whichever one is invalid.

[mjbvz]

Closing as upstream