Shell scripts for Meld Nautilus context menu

Question

Beyond Compare provides "Select for compare" and "Compare to Selected" by using two nautilus scripts (stored in /home/user/.gnome2/nautilus-scripts).

Script 1: Select for compare

#!/bin/sh
quoted=$(echo "$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS" | awk 'BEGIN { FS = "\n" } { printf "\"%s\" ", $1 }' | sed -e s#\"\"##)
echo "$quoted" > $HOME/.beyondcompare/nautilus

Script 2: Compare to Selected

#!/bin/sh
arg2=$(cat $HOME/.beyondcompare/nautilus)
arg1=$(echo "$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS" | awk 'BEGIN { FS = "\n" } { printf "\"%s\" ", $1 }' | sed -e s#\"\"##)
bcompare $arg1 $arg2

I am trying to do similar scripts for Meld, but it is not working.

I am not familiar with shell scripts. Can anyone help me understand this:

quoted=$(echo "$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS" | awk 'BEGIN { FS = "\n" } { printf "\"%s\" ", $1 }' | sed -e s#\"\"##)

so that I can adapt to meld.