pytorch-lightning

e1a6dd9e - Clarify return type in `training_step` docs in case of manual optimization (#19327)

Clarify return type in `training_step` docs in case of manual optimization (#19327) Co-authored-by: Julien Hauret <53187038+jhauret@users.noreply.github.com> Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>