EML as supported file language style
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Has there ever been any consideration given to supporting .eml files (or any other email file-save formats/extensions, if there are any) with their own language style? Ideally, this would incorporate many elements of the HTML language style, but also support things that are specific to email, as far as I know, like being able to collapse sections of any .eml file that are marked by boundaries (attachments, plain text, html, base64 text, headers, etc.)