CommitOptions.AllowEmptyCommits does nothing

[akamensky]

My code sets

	&git.CommitOptions{
		AllowEmptyCommits: false,
		Author: &object.Signature{
			Name:  author,
			Email: email,
			When:  time.Now(),
		},
	}

That however still allows completely empty commits through even if nothing was written. I am cloning to in-memory storage and modify files only if the contents is different (so I read files, on the same note, why is the billy.Filesystem does not implement fs.FS?).

I still have to do state.IsClean() check, which will actually check if there are any changes.

[durvalcarvalho]

Yep! Same thing here.

[onee-only]

I think this is the same problem as #723.