While I was debugging another issue, I noticed that the example included two bars with the same x and y values, and when you mouse over one of these bars both tooltips show up. It seems like Victory uses the x/y value to determine whether the tooltip is active when there is not another identifier.
.rickshaw_graph .detail .item.active from detail.css would benefit by adding 'width: auto; height:auto;' to auto-size the detail tooltip on graph mouse hover. In it's current form, the tooltip doesn't get auto-sized when using a relative/percentage based layout.
The “follow” operation added in #8671 stops when encountering a node that’s shared among multiple features. iD already keeps track of the “focused” way for the purpose of reliably navigating back and forth among its vertices using the keyboard. It would be natural to extend this capability to the follow operation, so that the user doesn’t have to think as much about other connecting ways after cho
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xref='paper'. Also the shapes and annotations tutorial should link to each other.