diff --git a/doc/examples/edges/plot_circular_elliptical_hough_transform.py b/doc/examples/edges/plot_circular_elliptical_hough_transform.py
index 5d5a8b2e..389a1afa 100755
--- a/doc/examples/edges/plot_circular_elliptical_hough_transform.py
+++ b/doc/examples/edges/plot_circular_elliptical_hough_transform.py
@@ -138,7 +138,9 @@ image_rgb[cy, cx] = (0, 0, 255)
 edges = color.gray2rgb(edges)
 edges[cy, cx] = (250, 0, 0)
 
-fig2, (ax1, ax2) = plt.subplots(ncols=2, nrows=1, figsize=(8, 4), sharex=True, sharey=True, subplot_kw={'adjustable':'box-forced'})
+fig2, (ax1, ax2) = plt.subplots(ncols=2, nrows=1, figsize=(8, 4), sharex=True,
+                                sharey=True,
+                                subplot_kw={'adjustable':'box-forced'})
 
 ax1.set_title('Original picture')
 ax1.imshow(image_rgb)