add missing newline @ EOF

src/main/resources/messages.yml

@@ -10,4 +10,4 @@ unbanned-member: <green>(!) Unbanned member <gray><player></gray> and <gray><n-a
 
 error:
   no-permission: <red>(!) You don't have permission to use this command.</red>
-  player-not-banned: <red>(!) Player <gray><player></gray> is not banned and is not a member.</red>
+  player-not-banned: <red>(!) Player <gray><player></gray> is not banned and is not a member.</red>