As we discussed in #1928, it seems better to print information about
abandoned commits in the context of the pre-abandon state. For
example, that means that we'll include any branches that pointed to
the now-abandoned commits.
They are shown next to the change and commit id, since they are other names the
commit can be referred by.
The description is separated from the branches by a ` | ` when there are
branches, so that one can tell the branches from the description without color.
The result looks like this: 
