Three dot notion used inconsitent?

From: Lars Schneider <larsxschneider@gmail.com>
Date: Nov 18, 2015, 10:31 UTC
Message-ID: <1CDF2D38-B73A-4C49-BC10-1F3BA1873733@gmail.com>

Hi,

I just stumbled across the this:

git diff branchA...branchB --> gives me the diff between (the common ancestor of A and B) and B. That means I never see changes on branchA.

git log branchA...branchB --> gives me the commits reachable from A and B. That includes changes from branchA.

Is this because of a design decision that I do not (yet) understand or is this inconsistent for historical reasons?

Thanks, Lars

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