print -> println in world start region preparation

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -897,7 +897,7 @@ public final class CraftServer implements Server {
         console.worlds.add(internal);
 
         pluginManager.callEvent(new WorldInitEvent(internal.getWorld()));
-        System.out.print("Preparing start region for level " + (console.worlds.size() - 1) + " (Seed: " + internal.getSeed() + ")");
+        System.out.println("Preparing start region for level " + (console.worlds.size() - 1) + " (Seed: " + internal.getSeed() + ")");
 
         if (internal.getWorld().getKeepSpawnInMemory()) {
             short short1 = 196;