xml_func.py: _eq(): Documented that '' (empty node) is returned if a value was not mapped to, not if a value was None, since None arguments are no longer removed by process() (now XML functions do this manually with conv_items())
xml_func.py: _eq(): Documented that '' (empty node) is returned if a value was not mapped to, not if a value was None, since None arguments are no longer removed by process() (now XML functions do this manually with conv_items())