diff --git a/doc/examples/plot_log_gamma.py b/doc/examples/plot_log_gamma.py
index d2d60149..fd0a6767 100644
--- a/doc/examples/plot_log_gamma.py
+++ b/doc/examples/plot_log_gamma.py
@@ -1,7 +1,7 @@
 """
-======================================
+=================================
 Gamma and log contrast adjustment
-======================================
+=================================
 
 This example adjusts image contrast by performing a Gamma and a Logarithmic
 corrections on the input image.
@@ -74,4 +74,4 @@ ax_cdf.set_yticks(np.linspace(0, 1, 5))
 
 # prevent overlap of y-axis labels
 fig.subplots_adjust(wspace=0.4)
-plt.show()
\ No newline at end of file
+plt.show()