Question about the git repository location of ipynb file on tutorials

I want to know the git location of ipynb file on the tutorials.

I know the git of the tutorials exists on follows
https://github.com/pytorch/tutorials

But I cannot find the git repository of following files in https://pytorch.org/tutorials/beginner/blitz/tensor_tutorial.html#sphx-glr-beginner-blitz-tensor-tutorial-py

one file is (Download Notebook)
https://pytorch.org/tutorials/_downloads/3c2b25b8a9f72db7780a6bf9b5fc9f62/tensor_tutorial.ipynb
another file is (Running on Google Colab)
https://colab.research.google.com/github/pytorch/tutorials/blob/gh-pages/_downloads/tensor_tutorial.ipynb

From README.md, I recognize the tutorial file is stored as xxxxxx_tutorial.py in the git repository.
But I cannot find the generation tool from python to jupyter notebook for the tutorial.
How to convert it?

Ref.
https://github.com/pytorch/tutorials/blob/master/README.md
https://pytorch.org/tutorials/beginner/blitz/tensor_tutorial.html#sphx-glr-beginner-blitz-tensor-tutorial-py

I found in the issue on the tutorials.