sum_tree: Replace rayon with futures (#41586)

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Co-authored by: Kate <kate@zed.dev>

crates/editor/src/movement.rs

@@ -878,6 +878,7 @@ mod tests {
     use gpui::{AppContext as _, font, px};
     use language::Capability;
     use project::{Project, project_settings::DiagnosticSeverity};
+    use rope::Rope;
     use settings::SettingsStore;
     use util::post_inc;
 
@@ -1024,22 +1025,22 @@ mod tests {
                     Inlay::edit_prediction(
                         post_inc(&mut id),
                         buffer_snapshot.anchor_before(offset),
-                        "test",
+                        Rope::from_str_small("test"),
                     ),
                     Inlay::edit_prediction(
                         post_inc(&mut id),
                         buffer_snapshot.anchor_after(offset),
-                        "test",
+                        Rope::from_str_small("test"),
                     ),
                     Inlay::mock_hint(
                         post_inc(&mut id),
                         buffer_snapshot.anchor_before(offset),
-                        "test",
+                        Rope::from_str_small("test"),
                     ),
                     Inlay::mock_hint(
                         post_inc(&mut id),
                         buffer_snapshot.anchor_after(offset),
-                        "test",
+                        Rope::from_str_small("test"),
                     ),
                 ]
             })