accelerate

0af45bf1 - Fix logic in `accelerator.prepare` + IPEX for 2+ `nn.Models` and/or `optim.Optimizers` (#3517)

Fix logic in `accelerator.prepare` + IPEX for 2+ `nn.Models` and/or `optim.Optimizers` (#3517) * Fix logic in _prepare_ipex * Add caution about prepare in IPEX docs * Add suggested workaround to IPEX docs * Revert unnecessary change * Update docs/source/usage_guides/ipex.md Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com> * Remove double space * Simplify logical checks for IPEX availability * Revert unnecessary change --------- Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com>