I upgraded Jupyter to the latest vesion, 5.0, and it looks like my front-end configuration stopped working.
I don\'t understand why Jupyter comes with auto closing quote
For JupyterLab visitors there is a "User Preferences" panel of the "Notebook" settings editor into which you paste & save:
{ "codeCellConfig": { "autoClosingBrackets": false } }
Open with Ctrl + , or via menu: Settings → Advanced Settings Editor & click "Notebook"
Ctrl + ,
Settings
Advanced Settings Editor