--- a/inst/io/private/planeSurfGeo.m
+++ b/inst/io/private/planeSurfGeo.m
@@ -1,15 +1,15 @@
 ## Copyright (C) 2012 Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
-## 
+##
 ## 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 3 of the License, 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.
-## 
+##
 ## You should have received a copy of the GNU General Public License along with
 ## this program; if not, see <http://www.gnu.org/licenses/>.
 
@@ -19,18 +19,18 @@
 ##
 ## @var{id} is the plane surface's identification number.
 ## @var{nloop} is the number of loops defining the surface.
-## @var{loops} contain the identification numbers of all the line loops defining 
+## @var{loops} contain the identification numbers of all the line loops defining
 ## the surface. The first line loop defines the exterior boundary of the surface;
 ## all other line loops define holes in the surface. A line loop defining a hole
 ## should not have any lines in common with the exterior line loop (in which case
-## it is not a hole, and the two surfaces should be defined separately). 
-## Likewise, a line loop defining a hole should not have any lines in common with 
-## another line loop defining a hole in the same surface (in which case the two 
+## it is not a hole, and the two surfaces should be defined separately).
+## Likewise, a line loop defining a hole should not have any lines in common with
+## another line loop defining a hole in the same surface (in which case the two
 ## line loops should be combined).
 ##
 ## @end deftypefn
 
 function str = planeSurfGeo(id,nloop,loops)
-    substr = repmat(',#d',1,nloop-1);
-    str = sprintf(['Plane Surface(#d) = {#d' substr '};\n'],id,loops);
+    substr = repmat(',%d',1,nloop-1);
+    str = sprintf(['Plane Surface(%d) = {%d' substr '};\n'],id,loops);
 end