--- a/scripts/signal/spectral_adf.m
+++ b/scripts/signal/spectral_adf.m
@@ -1,37 +1,37 @@
 ## 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.
 
 ## usage:  retval = spectral_adf (c, [win, [b]])
-## 
+##
 ## Returns the spectral density estimator.
 ## c ....... vector of autocovariances (starting at lag 0)
 ## win ..... window name, eg. "triangle" or "rectangle"
 ##           spectral_adf searches for a function called win_lw ()
 ## b ....... bandwidth
-## 
+##
 ## If win is omitted, the triangle window is used as default.
 ## If b is omitted, 1 / sqrt( length (c)) is used as default.
-  
+
 ## Author:  FL <Friedrich.Leisch@ci.tuwien.ac.at>
 ## Description:  Spectral density estimation
-  
+
 function retval = spectral_adf (c, win, b)
-  
+
   cr = length (c);
-  
+
   if (columns (c) > 1)
     c=c';
   endif
@@ -46,16 +46,16 @@
     win = [win, "_lw"];
     w = feval (win, cr, b);
   endif
-      
+
   c = c .* w;
-  
+
   retval = 2 * real (fft (c)) - c(1);
   retval = [(zeros (cr, 1)), retval];
   retval(:, 1) = (0 : cr-1)' / cr;
-  
+
 endfunction
-    
-
-  
 
 
+
+
+