Does this issue occur when all extensions are disabled?: Yes
Note: All extensions disabled - except python and jupyter notebook

The function to trim whitespaces does not work in jupyter notebook code cells

• VS Code Version: 1.78.0 (252e546) - x64
• OS Version: Win 11 Pro

Steps to Reproduce:

1. Create a new Jupyter Notebook (.ipynb) file
2. Create a cell and put some code with tailing whitespaces and empty lines in it

Example: