Without extension, Visual Studio Code "auto detect" mistakes AsciiDoc for Markdown

[hickford]

Assuming you don't have the AsciiDoctor extension installed, Visual Studio Code's "auto detect" feature mistakes AsciiDoc for Markdown, even if it has the file extension .adoc.

This is a bug in upstream Visual Studio Code, but it's relevant to this project because it makes this extension harder to discover for Visual Studio Code users.

[hickford]

Upstream bugs

1. Links/Samples where language auto-detection doesn't work microsoft/vscode#131450 (comment)
2. Recognise Asciidoc yoeo/guesslang#80