libgit2/pygit2 — pull request #337 by carlosmn (2014-02-06 09:47:29+00:00)
Title: walk: make the sorting mode optional

Since the libgit2 has a default sorting method, which we also mention as
default in the documentation, there is no particular need to make the
user choose a sorting method when the order does not matter. We use
sorting NONE in that case.