--- a/ConfigTreeNode.py	Wed Aug 16 17:27:58 2017 +0300
+++ b/ConfigTreeNode.py	Thu Aug 17 09:55:39 2017 +0300
@@ -452,12 +452,12 @@
         res = DesiredChannel
         while res in AllChannels:  # While channel not free
             if res < CurrentChannel:  # Want to go down ?
-                res -=  1  # Test for n-1
+                res -= 1  # Test for n-1
                 if res < 0:
                     self.GetCTRoot().logger.write_warning(_("Cannot find lower free IEC channel than %d\n") % CurrentChannel)
                     return CurrentChannel  # Can't go bellow 0, do nothing
             else:  # Want to go up ?
-                res +=  1  # Test for n-1
+                res += 1  # Test for n-1
         # Finally set IEC Channel
         self.BaseParams.setIEC_Channel(res)
         return res