Without this patch the specified behavior of strings that are numeric
only and zero padded is unclear and untested in the spec tests. This is
a problem because it's not clear that range('00', '10') will actually
return [ "0", "1", ..., "10" ] instead of [ "00", "01", ..., "10" ]
This patch addresses the issue by providing explicit test coverage. If
the string conversion behavior of puppet changes, this test will begin
to fail.
