Steps to reproduce

Request docs/schema.js when using a Python 3 server.

Expected behavior

Get valid Javascript looking like:

var coreJSON = window.atob('eyJf...');

Actual behavior

Under Py3 the base64.b64encode() method returns a binary object, which gets rendered as b'...' in schema.js. This results in the output becoming:

var coreJSON = window.atob('b'eyJf...'');

which is invalid Javascript.