Revert "review: git change doesn't pass @{u} correctly on windows."
Revert "review: git change doesn't pass @{u} correctly on windows."

This reverts commit 0d7922879a3c8f00706afeff7e19df53620dfc64.

This change fixed the behavior for older versions of Git, but newer versions were unaffected. Let's prioritize newer versions.

Change-Id: I7bf3a3653835a800ad5085522660d39ae3770d25
Reviewed-on: https://go-review.googlesource.com/13859
Reviewed-by: Yasuhiro MATSUMOTO <9b1c42e567326d02f223843097d918a102bd7788@gmail.com>
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

Go-zh/review,golang/review