--- a/scripts/set/setxor.m	Fri Apr 23 11:13:48 2010 -0700
+++ b/scripts/set/setxor.m	Fri Apr 23 11:28:50 2010 -0700
@@ -63,24 +63,24 @@
       n = rows (c);
       idx = find (all (c(1:n-1) == c(2:n), 2));
       if (! isempty (idx))
-	c([idx, idx+1],:) = [];
-	i([idx, idx+1],:) = [];
+        c([idx, idx+1],:) = [];
+        i([idx, idx+1],:) = [];
       endif
     else
       na = numel (a); nb = numel (b);
       [c, i] = sort ([a(:); b(:)]);
       n = length (c);
       if (iscell (c))
-        idx = find (strcmp (c(1:n-1), c(2:n)));	  
+        idx = find (strcmp (c(1:n-1), c(2:n)));   
       else
         idx = find (c(1:n-1) == c(2:n));
       endif
       if (! isempty (idx))
-	c([idx, idx+1]) = [];
-	i([idx, idx+1]) = [];
+        c([idx, idx+1]) = [];
+        i([idx, idx+1]) = [];
       endif
       if (size (a, 1) == 1 || size (b, 1) == 1)
-	c = c.';
+        c = c.';
       endif
     endif
   endif