* remove references to old API in docstring - update data processors * style * fix tests - better type checking error messages * better type checking * include awesome fix by @LysandreJik for #5310 * updated doc and examples
* add initial fine-tuning guide * split code blocks to smaller segments * fix up trianer section of fine-tune doc * a few last typos * Update usage -> task summary link Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>