Fix clippy lints

widget/src/text_editor.rs

@@ -406,12 +406,13 @@ where
 
                 shell.publish(on_edit(action));
             }
-            Update::Scroll(mut lines) => {
-                lines += state.partial_scroll;
+            Update::Scroll(lines) => {
+                let lines = lines + state.partial_scroll;
                 state.partial_scroll = lines.fract();
+
                 shell.publish(on_edit(Action::Scroll {
                     lines: lines as i32,
-                }))
+                }));
             }
             Update::Unfocus => {
                 state.is_focused = false;