Clarify tensor conversion example by padding sequences to equal length

[Karthika-ps]

The original example showed sequences of different lengths, which cannot be directly converted to a tensor. This update adds padding to ensure the sequences are rectangular before tensor conversion.

[HuggingFaceDocBuilderDev]

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[junepil]

I was also confused about the example in this chapter and doubt the purpose of the code. 👍

[Karthika-ps]

I was also confused about the example in this chapter and doubt the purpose of the code. 👍

Thanks for the feedback! I had the same confusion initially. The main goal of the change was to clarify that sequences of different lengths cannot be directly converted to a tensor, and that padding is required first to make the inputs rectangular. I’m glad this confusion was shared.