--- a/scripts/statistics/base/spearman.m
+++ b/scripts/statistics/base/spearman.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.
@@ -35,7 +35,7 @@
 ## Description:  Spearman's rank correlation rho
 
 function rho = spearman (x, y)
-  
+
   if ((nargin < 1) || (nargin > 2))
     usage ("spearman (x [, y])");
   endif
@@ -44,7 +44,7 @@
     x = x';
   endif
   n = rows (x);
-  
+
   if (nargin == 1)
     rho = cor (ranks (x));
   else
@@ -53,9 +53,9 @@
     endif
     if (rows (y) != n)
       error (["spearman:  ", ...
-	      "x and y must have the same number of observations"]);
+              "x and y must have the same number of observations"]);
     endif
     rho = cor (ranks (x), ranks (y));
   endif
-  
+
 endfunction