`torch.mm` != `torch.matmul`

[AntonOfTheWoods]

Around 02:40:00 you say that that one is an alias of the other. That is not the case

https://pytorch.org/docs/stable/generated/torch.matmul.html#torch.matmul

https://pytorch.org/docs/stable/generated/torch.mm.html

They are different, in spite of the fact that in certain circumstances they might return the same thing. At the top of the mm docs they state

This function does not [broadcast](https://pytorch.org/docs/stable/notes/broadcasting.html#broadcasting-semantics). For broadcasting matrix products, see [torch.matmul()](https://pytorch.org/docs/stable/generated/torch.matmul.html#torch.matmul).

[mrdbourke]

Good catch! Thank you!

Update: add this to the errors discussion - #98 - if you have anymore I'd welcome them there/here :)