I personally mostly use "git blame-jump" so this "git blame" bug has
flown under the radar. When we run git blame in a git-diff buffer,
we want to move one column to the left since the lines in the target
blob don't have the +- prefix. We already subtract one but we add it
back accidentally when using "l" to go to this column. Fix it.
In future we should try to preserve more of the selection(s), not
just the main cursor.
efaf9ab4e2