remove colons in comments

doc/examples/plot_shapes.py

@@ -19,11 +19,11 @@ import numpy as np
 
 img = np.zeros((500, 500, 3), 'uint8')
 
-#: draw line
+# draw line
 rr, cc = line(120, 123, 20, 400)
 img[rr,cc,0] = 255
 
-#: fill polygon
+# fill polygon
 poly = np.array((
     (300, 300),
     (480, 320),
@@ -34,11 +34,11 @@ poly = np.array((
 rr, cc = polygon(poly[:,0], poly[:,1], img.shape)
 img[rr,cc,1] = 255
 
-#: fill circle
+# fill circle
 rr, cc = circle(200, 200, 100, img.shape)
 img[rr,cc,:] = (255, 255, 0)
 
-#: fill ellipse
+# fill ellipse
 rr, cc = ellipse(300, 300, 100, 200, img.shape)
 img[rr,cc,2] = 255