Fix broken test

src/handwriting/mod.rs

@@ -780,6 +780,8 @@ mod test {
 
     use egui::{Event, Modifiers, PointerButton, Pos2, Rect, emath::RectTransform};
 
+    use crate::handwriting::tool::pencil;
+
     use super::{Handwriting, process_event};
 
     #[test]
@@ -978,7 +980,7 @@ mod test {
         let from_screen = from_screen();
         for event in TEST_EVENTS {
             process_event(&mut last_pos, from_screen, event, |tool_event| {
-                handwriting.on_tool_event(tool_event);
+                pencil::on_tool_event(&mut handwriting, tool_event);
             });
         }
         let serialized = handwriting.to_string();