trinity-base/arts: Consistent indendation, useless newline

Package-Manager: Portage-3.0.8, Repoman-3.0.1
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

trinity-base/arts/metadata.xml

@@ -6,7 +6,6 @@
 		<name>Alexander Golubev</name>
 	</maintainer>
 	<use>
-      <flag name="artswrappersuid">Set artswrapper suid for realtime playing, which is a security hazard</flag>
+		<flag name="artswrappersuid">Set artswrapper suid for realtime playing, which is a security hazard</flag>
-    </use>
+	</use>
-
 </pkgmetadata>