How to disable smart brackets in Jupyter Notebook?

How can I disable smart brackets and quotes in Jupyter Notebook? The advice here is to create a file ~/.jupyter/nbconfig/notebook.json with the content

    "CodeCell": {
        "cm_config": {
            "autoCloseBrackets": false
            "autoCloseQuotes": false

This is for Jupyter Notebook 5.0. However, I’m using version 6.3, and it doesn’t work for me.

Forget it, there was a typo …