clarify what was done to beginners

[odinplusplus]

It is useful for beginners to know that the name of this process is normalization (for future searches), in addition to making it explicit that the input and the train set will also be normalized.

[google-cla]

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[github-actions]

Preview

Preview and run these notebook edits with Google Colab:

• site/en/tutorials/quickstart/beginner.ipynb

Rendered notebook diffs available on ReviewNB.com.

Format and style

Use the TensorFlow docs notebook tools to format for consistent source diffs and lint for style:

$ python3 -m pip install -U --user git+https://github.com/tensorflow/docs

$ python3 -m tensorflow_docs.tools.nbfmt notebook.ipynb

$ python3 -m tensorflow_docs.tools.nblint --arg=repo:tensorflow/docs notebook.ipynb

If commits are added to the pull request, synchronize your local branch: git pull origin update-docs