diff --git a/DiffractionGratings/grating2D.pro b/DiffractionGratings/grating2D.pro
index 03028861d6a5c2670f72f8c76950f0ec2e48f9d9..ea6e771e9a5ee49e78d4dbde984133d35dcc1504 100644
--- a/DiffractionGratings/grating2D.pro
+++ b/DiffractionGratings/grating2D.pro
@@ -14,7 +14,7 @@ lambda_min = lambda_min * nm;
 lambda_max = lambda_max * nm;
 A          = 1.;
 nb_orders  = nb_orders+1;
- 
+
 Group {
   // Boundaries
   SurfBlochLeft   = Region[SURF_BLOCH_X_LEFT];