Updated exp diff tables

[daavoo]

P.R. for iterative/dvc#6888

[dberenbaum]

In the synopsis section of the cmd ref, --old is still shown as an option.

Also, where are the related core/docs PRs for metrics diff --old?

[daavoo]

Also, where are the related core/docs PRs for metrics diff --old?

There is not such an option for dvc metrics diff (And, afaik, it has never existed). It looks like the docs are not in sync with the command

[jorgeorpinel]

There is not such an option

It must have existed when @iesahin wrote this. Anyway, thanks for the update!

[iesahin]

FYI --old joined to dvc metrics diff options in https://github.com/iterative/dvc.org/pull/1360/files

@daavoo @jorgeorpinel

[jorgeorpinel]

Now, that's --old.