HF emoji unicode doesn't work in console
It doesn't look like using 🤗 is a great idea for printing to console. See attachment.

![snapshot_21](https://user-images.githubusercontent.com/10676103/113665185-e604cb00-9661-11eb-9b4b-d0f0423c6695.png)

This PR proposes to replace 🤗 with "HuggingFace" for an exception message.

@LysandreJik
