remove trailing whitespace

src/compute_gyration.cpp

@@ -109,7 +109,7 @@ void ComputeGyration::compute_vector()
     }
   MPI_Allreduce(rg,vector,6,MPI_DOUBLE,MPI_SUM,world);
 
-  if (masstotal > 0.0) 
+  if (masstotal > 0.0)
     for (int i = 0; i < 6; i++)
       vector[i] /= masstotal;
 }