Add extra test for nested list binding

spring-boot/src/test/java/org/springframework/boot/bind/RelaxedDataBinderTests.java

@@ -235,6 +235,14 @@ public class RelaxedDataBinderTests {
 		assertEquals("[bar, foo]", target.getNested().toString());
 	}
 
+	@Test
+	public void testBindDoubleNestedReadOnlyListIndexed() throws Exception {
+		TargetWithReadOnlyDoubleNestedList target = new TargetWithReadOnlyDoubleNestedList();
+		this.conversionService = new DefaultConversionService();
+		bind(target, "bean.nested[0]:bar\nbean.nested[1]:foo");
+		assertEquals("[bar, foo]", target.getBean().getNested().toString());
+	}
+
 	@Test
 	public void testBindNestedReadOnlyCollectionIndexed() throws Exception {
 		TargetWithReadOnlyNestedCollection target = new TargetWithReadOnlyNestedCollection();
@@ -561,6 +569,14 @@ public class RelaxedDataBinderTests {
 		}
 	}
 
+	public static class TargetWithReadOnlyDoubleNestedList {
+		TargetWithReadOnlyNestedList bean = new TargetWithReadOnlyNestedList();
+
+		public TargetWithReadOnlyNestedList getBean() {
+			return this.bean;
+		}
+	}
+
 	public static class TargetWithReadOnlyNestedCollection {
 		private final Collection<String> nested = new ArrayList<String>();