--- a/scripts/signal/spencer.m
+++ b/scripts/signal/spencer.m
@@ -1,15 +1,15 @@
 ## Copyright (C) 1995, 1996, 1997  Friedrich Leisch
-## 
+##
 ## This program is free software; you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
 ## the Free Software Foundation; either version 2, or (at your option)
 ## any later version.
-## 
+##
 ## This program is distributed in the hope that it will be useful, but
 ## WITHOUT ANY WARRANTY; without even the implied warranty of
 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-## General Public License for more details. 
-## 
+## General Public License for more details.
+##
 ## You should have received a copy of the GNU General Public License
 ## along with this file.  If not, write to the Free Software Foundation,
 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
@@ -17,34 +17,34 @@
 ## usage:  spencer (X)
 ##
 ## returns Spencer's 15 point moving average of every single column of X
- 
+
 ## Author:  FL <Friedrich.Leisch@ci.tuwien.ac.at>
 ## Description:  Apply Spencer's 15-point MA filter
 
 function retval = spencer (X)
-  
+
   if (nargin != 1)
     usage ("spencer (X)");
   endif
 
   [xr, xc] = size(X);
-  
+
   n = xr;
   c = xc;
-  
+
   if (is_vector(X))
    n = length(X);
    c = 1;
    X = reshape(X, n, 1);
   endif
-   
+
   W = [-3, -6, -5, 3, 21, 46, 67, 74, 67, 46, 21, 3, -5, -6, -3] / 320;
 
   retval = fftfilt (W, X);
   retval = [zeros(7,c); retval(15:n,:); zeros(7,c);];
-  
+
   retval = reshape(retval, xr, xc);
-  
+
 endfunction