add anchored move edge case to unit tests

In case soft-wrap is enabled and the newline character is wrapped into
the next line, the current implementation breaks.

helix-core/src/movement.rs

@@ -929,7 +929,7 @@ mod test {
         let mut text_fmt = TextFormat::default();
         text_fmt.soft_wrap = true;
         text_fmt.viewport_width = 4;
-        let text = Rope::from("aaaabb\naa\n\n");
+        let text = Rope::from("aaaabb\naa\n\naaaa\n\n");
         let slice = text.slice(..);
         let pos = pos_at_coords(slice, (0, 5).into(), true);
         let mut range = Range::new(pos, pos);
@@ -950,6 +950,14 @@ mod test {
         assert_eq!(coords_at_pos(slice, range.head), (1, 1).into());
         range = vvmove(range, Direction::Forward);
         assert_eq!(coords_at_pos(slice, range.head), (2, 0).into());
+        range = vvmove(range, Direction::Forward);
+        assert_eq!(coords_at_pos(slice, range.head), (3, 3).into());
+        range = vvmove(range, Direction::Forward);
+        assert_eq!(coords_at_pos(slice, range.head), (4, 0).into());
+        range = vvmove(range, Direction::Backward);
+        assert_eq!(coords_at_pos(slice, range.head), (3, 3).into());
+        range = vvmove(range, Direction::Backward);
+        assert_eq!(coords_at_pos(slice, range.head), (4, 0).into());
         range = vvmove(range, Direction::Backward);
         assert_eq!(coords_at_pos(slice, range.head), (1, 1).into());
         range = vvmove(range, Direction::Backward);