unsorted lists can become sorted after removal

The old code only set the list to sorted when the lists size was <= 1
after the removal.

primitiveCollections/src/test/java/org/lucares/collections/IntListTest.java

@@ -1223,6 +1223,30 @@ public class IntListTest {
 		Assert.assertTrue("unsorted list with no elements becomes sorted", list.isSorted());
 	}
 
+	@Test
+	public void testSortedFlagRemove_unsortedBecomesSorted_emptyList() {
+
+		final IntList list = IntList.of(4, 3, 2, 1);
+		list.remove(0, 4); // removes all
+		Assert.assertTrue("empty list is sorted", list.isSorted());
+	}
+
+	@Test
+	public void testSortedFlagRemove_unsortedBecomesSorted_oneElement() {
+
+		final IntList list = IntList.of(4, 3, 2, 1);
+		list.remove(1, 4); // removes 3,2,1
+		Assert.assertTrue("list with one element is", list.isSorted());
+	}
+
+	@Test
+	public void testSortedFlagRemove_unsortedBecomesSorted() {
+
+		final IntList list = IntList.of(1, 2, 777, 4, 5);
+		list.remove(2, 3); // removes 777
+		Assert.assertTrue("list is sorted after remove", list.isSorted());
+	}
+
 	@Test
 	public void testSortedFlagRemoveAll() {
 
@@ -1253,6 +1277,31 @@ public class IntListTest {
 		Assert.assertTrue("unsorted list with no elements becomes sorted", list.isSorted());
 	}
 
+	@Test
+	public void testSortedFlagRemoveIf_unsortedBecomesSorted_emptyAfterRemove() {
+
+		final IntList list = IntList.of(1, 3, 2);
+		list.removeIf((value, index) -> true); // makes the list sorted
+		Assert.assertTrue("list is empty", list.isEmpty());
+		Assert.assertTrue("empty list is sorted", list.isSorted());
+	}
+
+	@Test
+	public void testSortedFlagRemoveIf_unsortedBecomesSorted_oneElementAfterRemove() {
+
+		final IntList list = IntList.of(1, 3, 2);
+		list.removeIf((value, index) -> value > 1); // makes the list sorted
+		Assert.assertTrue("list with one element is sorted", list.isSorted());
+	}
+
+	@Test
+	public void testSortedFlagRemoveIf_unsortedBecomesSorted() {
+
+		final IntList list = IntList.of(1, 2, 3, 777, 4, 5);
+		list.removeIf((value, index) -> value == 777); // makes the list sorted
+		Assert.assertTrue("unsorted list becomes sorted", list.isSorted());
+	}
+
 	@Test
 	public void testSortedFlagReplace() {