STY: fix line length

Author: tacaswell

03-spline_demo.py

@@ -303,10 +303,11 @@ def q_phi_to_xy(self, q, phi, cross=None):
 
 
 fig, ax = plt.subplots()
-ax.set_title('left-click to add points, right-click to remove, shift-click to clear')
+ax.set_title(
+    'left-click to add points, right-click to remove, shift-click to clear')
 sp = SplineFitter(ax, .001)
 plt.show()
 
 
-# exercise
+# exercise (10 minutes)
 # - add pick event to move a point