diff --git a/examples/mplot3d/polys3d_demo.py b/examples/mplot3d/polys3d_demo.py
index 0d04d213a1ff..a7c115785200 100644
--- a/examples/mplot3d/polys3d_demo.py
+++ b/examples/mplot3d/polys3d_demo.py
@@ -3,7 +3,7 @@
 Generate polygons to fill under 3D line graph
 =============================================
 
-Demonstrate how to create polygons which fill the space under a line 
+Demonstrate how to create polygons which fill the space under a line
 graph. In this example polygons are semi-transparent, creating a sort
 of 'jagged stained glass' effect.
 """