Flipped labels in Chapter 25

[diganelin]

There is an issue on chapter 25, in the graph after the following paragraph
"To grasp what SDID is doing, we can plot the Diff-in-Diff lines for the treated (California) and the SDID Synthetic Control. Notice how we are projecting the trend we see in the synthetic control onto the treated unit to get the counterfactual . The difference between the dashed purple line and the lower solid purple line is the . We start those lines in 1987 to show how the time weights zero out all periods but 1986, 87 and 88. The time weights are also shown in the small plot down below."

The red line should be "Synthetic Control (SDID)" and the blue line "California", as in the previous similar graph.

Code fix:
ax1.plot(data_piv.index, sc_did, label="Synthetic Control (SDID)")
ax1.plot(data_piv.index, data_piv["california"], label="California")