tests/ascii-armored-keys: convert key to armored using gpg instead of sed

tests/ascii-armored-keys

@@ -13,9 +13,7 @@ rmdir /etc/apt/trusted.gpg.d
 mkdir /etc/apt/trusted.gpg.d
 for f in /usr/share/keyrings/*.gpg; do
 	name=$(basename "$f" .gpg)
-	gpg --enarmor < "/usr/share/keyrings/$name.gpg" \
-		| sed 's/ PGP ARMORED FILE/ PGP PUBLIC KEY BLOCK/;/^Comment: /d' \
-		> "/etc/apt/trusted.gpg.d/$name.asc"
+	gpg --no-default-keyring --keyring="/usr/share/keyrings/$name.gpg" --armor --output="/etc/apt/trusted.gpg.d/$name.asc" --export
 	rm "/usr/share/keyrings/$name.gpg"
 done
 {{ CMD }} --mode=root --variant=apt {{ DIST }} /tmp/debian-chroot.tar {{ MIRROR }}