echo "" > /tmp/part_list.groff echo ".nf" >> /tmp/part_list.groff  # NO FILL MODE 
FIRST_PASS="true"

for A_DEVICE in $(lsblk --noheadings -o kname) ; do
... 
...
...
    if [[ -z $FIRST_PASS ]] ; then
           echo ".bp" >> /tmp/part_list.groff  # do a page break if not processing the first device
        else
            FIRST_PASS=""
        fi
         CUR_DEVICE="$A_DEVICE"      # A_DEVICE = /dev/sda /dev/sdb /dev/sdc .....           
         gdisk -l "$CUR_DEVICE"  >>  /tmp/part_list.groff  2>&1  

done
 #
# Finished
#
echo ".pl -3" >> /tmp/part_list.groff  # i do adjustment because groff page length does not match 
                                                 # the page length of my laser printer
                                                 # so I got to much line feed.
echo ".ex" >> /tmp/part_list.groff     # No more to do

groff -Tascii /tmp/part_list.groff > /tmp/part_list.txt