fix filename error

shell-scripts.d/xpath.sh

@@ -23,14 +23,14 @@ pad_num="$(printf "%03d\n" $canto_num)"
 # Create complete filename
 if [[ "$canticle" == 'i' ]]; then
 	canticle='Inferno'
-	file="$pad_num-inferno.xml"
+	file="$pad_num-inferno-petrocchi.xml"
 	echo $file
 elif [[ "$canticle" == 'r' ]]; then
 	canticle='Purgatorio'
-	file="$pad_num-purgatorio.xml"
+	file="$pad_num-purgatorio-petrocchi.xml"
 elif [[ "$canticle" == 'p' ]]; then
 	canticle='Paradiso'
-	file="$pad_num-paradiso.xml"
+	file="$pad_num-paradiso-petrocchi.xml"
 else
 	echo "Not a valid canto file: $file"
 fi