a treeish git cowardly refuses to pick one and asks for the command to use

the unambiguous syntax where '--' seperates the treeish from the paths.

* ``Repo.commits``, ``Repo.commits_between``, ``Reop.commits_since``,

* ``Repo.commits``, ``Repo.commits_between``, ``Repo.commits_since``,

``Repo.commit_count``, ``Repo.commit``, ``Commit.count`` and

``Commit.find_all`` all now optionally take a path argument which

constrains the lookup by path. This changes the order of the positional