Change all echo to printf for consistency

vaporget

@@ -61,11 +61,11 @@ WEBSITE="https://vaporwave.ivan.moe/list/"
 # Look for -V; if found, return 2
 check_options()
 {
-	local OPTIONS_STRING=$(echo "$CMDLINE" | sed -e 's/ [^-]*//g' -e 's/-//g')
+	local OPTIONS_STRING=$(printf "$CMDLINE" | sed -e 's/ [^-]*//g' -e 's/-//g')
 
 	if [ "${OPTIONS_STRING#*h}" != "$OPTIONS_STRING" ]
 	then
-		echo "$HELP_TEXT"
+		printf "$HELP_TEXT"
 		return 2
 	fi
 
@@ -77,7 +77,7 @@ check_options()
 
 	if [ "${OPTIONS_STRING#*V}" != "$OPTIONS_STRING" ]
 	then
-		echo "$VERSION_INFOTEXT"
+		printf "$VERSION_INFOTEXT"
 		return 2
 	fi
 
@@ -162,10 +162,10 @@ while getopts pdm:Vh f; do
 			MODE="download"
 		;;
 		m)
-			MPV_CMDLINE=$(echo "${OPTARG}" | sed -e 's/[[:space:]]//g' -e 's/[^,]\{2,\}/--& /g' -e 's/\(^\|,\)[[:alnum:]]\($\|,\)/ -& /g' -e 's/,//g')
+			MPV_CMDLINE=$(printf "${OPTARG}" | sed -e 's/[[:space:]]//g' -e 's/[^,]\{2,\}/--& /g' -e 's/\(^\|,\)[[:alnum:]]\($\|,\)/ -& /g' -e 's/,//g')
 		;;
 		\?)
-			echo "${USAGE}" >&2 && exit 1
+			printf "${USAGE}" >&2 && exit 1
 		;;
 	esac
 done
@@ -179,7 +179,7 @@ CHOICES=$(get_library "${WEBSITE}" | select_artist_list "${WEBSITE}")
 
 clear
 if [ -z "${CHOICES}" ]; then	# User didn't select any artist
-	echo "Please, select at least one artist." >&2
+	printf "Please, select at least one artist." >&2
 	exit 1
 fi