Added support for plural strings in ExprtextOf

src/main/java/org/skriptlang/skript/bukkit/misc/expressions/ExprTextOf.java

@@ -17,6 +17,7 @@
 import ch.njol.util.coll.CollectionUtils;
 import net.kyori.adventure.text.serializer.bungeecord.BungeeComponentSerializer;
 import net.md_5.bungee.api.chat.BaseComponent;
+import java.util.Arrays;
 
 @Name("Text Of")
 @Description({
@@ -53,14 +54,14 @@ public class ExprTextOf extends SimplePropertyExpression<Object, String> {
 	public Class<?> @Nullable [] acceptChange(ChangeMode mode) {
 		return switch (mode) {
 			case RESET -> CollectionUtils.array();
-			case SET -> CollectionUtils.array(String.class);
+			case SET -> CollectionUtils.array(String[].class);
 			default -> null;
 		};
 	}
 
 	@Override
 	public void change(Event event, Object @Nullable [] delta, ChangeMode mode) {
-		String value = delta == null ? null : (String) delta[0];
+		String value = delta == null ? null : String.join("\n", Arrays.copyOf(delta, delta.length, String[].class));
 		for (Object object : getExpr().getArray(event)) {
 			if (!(object instanceof TextDisplay textDisplay))
 				continue;

src/test/skript/tests/syntaxes/expressions/ExprTextOf.sk

@@ -23,3 +23,14 @@ test "text of text displays":
 	assert text of {_td} is "" with "failed to reset text"
 
 	delete entity within {_td}
+	spawn text display at test-location:
+		set {_multilineTest} to entity
+	set text of {_multilineTest} to "test", "testing" and "hello!!!"
+	assert text of {_multilineTest} is "test%nl%testing%nl%hello!!!" with "multiple lines with list1 set"
+	set {_line::1} to "hi!"
+	set {_line::2} to "i am"
+	set {_line::3} to "skripting..."
+	set text of {_multilineTest} to {_line::*}
+	assert text of {_multilineTest} is "hi!%nl%i am%nl%skripting..." with "multiple lines with list2 set"
+
+	delete entity within {_multilineTest}