`jj chmod` won't operate on conflicts involving non-files on the
positive sides. However, the error message says "None of the sides of
the conflict are files", which is not correct.
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: 
