--- a/scripts/statistics/base/ppplot.m
+++ b/scripts/statistics/base/ppplot.m
@@ -1,15 +1,15 @@
 ## Copyright (C) 1995, 1996, 1997  Kurt Hornik
-## 
+##
 ## 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.
@@ -35,11 +35,11 @@
 ## Description:  Perform a PP-plot (probability plot)
 
 function [p, y] = ppplot (x, dist, ...)
-  
+
   if (nargin < 1)
     usage ("ppplot (x [, dist [, params]])");
   endif
-  
+
   if !is_vector (x)
     error ("ppplot:  x must be a vector.");
   endif
@@ -57,7 +57,7 @@
   else
     y = feval (F, s, all_va_args);
   endif
-  
+
   if (nargout == 0)
     axis ([0, 1, 0, 1]);
     set nokey;