Because this string is hardwired in tool/gio.py:
http://code.google.com/p/ccc-gistemp/source/browse/trunk/tool/gio.py?r=956#1854
So that's a bug. Well spotted
http://code.google.com/p/ccc-gistemp/issues/detail?id=114
--
Nick Barnes, Climate Code Foundation, http://climatecode.org/