Try using Editor in Docs

[aurindam]

Now you can edit the code in the docs and press on "play" button to see the changes. There is also a copy button for easily copying the code.

[tronical]

I get a JavaScript error when trying this: Unhandled Promise Rejection: TypeError: undefined is not an object (evaluating 'cm6.createEditorState').

I assume that cm6 refers to CodeMirror as editor. I'm not in favor of shipping minified bundles in our repo, it's like embedding binaries. This might mean that it may be necessary to add a bundler to our sphinx build.