fix #4

src/main.rs

@@ -15,6 +15,10 @@ fn main() -> Result<(), std::io::Error> {
     app.grid.set_cell("D0", "x2".to_string());
     app.grid.set_cell("D1", "=C1*2".to_string());
 
+    app.grid.set_cell("A4", "Recursive references don't break anything!".to_string());
+    app.grid.set_cell("A5", "=B5".to_string());
+    app.grid.set_cell("B5", "=A5".to_string());
+
     let res = app.run(term);
     ratatui::restore();
     return res;