Clarify what the command is doing.

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>

gravity.sh

@@ -288,8 +288,14 @@ gravity_advanced() {
 	echo -n "::: Formatting list of domains to remove comments...."
 	#awk '($1 !~ /^#/) { if (NF>1) {print $2} else {print $1}}' ${piholeDir}/${matterAndLight} | sed -nr -e 's/\.{2,}/./g' -e '/\./p' >  ${piholeDir}/${supernova}
 	#Above line does not correctly grab domains where comment is on the same line (e.g 'addomain.com #comment')
-	#Add additional awk command to read all lines up to a '#', and then continue as we were
-	cat ${piholeDir}/${matterAndLight} | awk -F'#' '{print $1}' | awk -F'/' '{print $1}' | awk '($1 !~ /^#/) { if (NF>1) {print $2} else {print $1}}' | sed -nr -e 's/\.{2,}/./g' -e '/\./p' >  ${piholeDir}/${supernova}
+	#Awk -F splits on given IFS, we grab the right hand side (chops trailing #coments and /'s to grab the domain only.
+	#Last awk command takes non-commented lines and if they have 2 fields, take the left field (the domain) and leave
+	#+ and leave the right (IP address), otherwise grab the single field.
+	cat ${piholeDir}/${matterAndLight} | \
+	    awk -F '#' '{print $1}' | \
+	    awk -F '/' '{print $1}' | \
+	    awk '($1 !~ /^#/) { if (NF>1) {print $2} else {print $1}}' | \
+	    sed -nr -e 's/\.{2,}/./g' -e '/\./p' >  ${piholeDir}/${supernova}
 	echo " done!"
 
 	numberOf=$(wc -l < ${piholeDir}/${supernova})