Instructs the PDL processing sub-system to finishing
processing the current page of the current job. Form
feed is also known as close page or eject page. If the
PDL processing sub-system is in a FORM-FEED-NEEDED
state, this causes the device to flush or finish
processing the current page of the current job. If the
device is not in the FORM-FEED-NEEDED state, an
<genErr> will occur.