[fine] Static methods I guess

fine/tests/example_tests.rs

@@ -285,9 +285,10 @@ fn assert_eval_ok(tree: &SyntaxTree, lines: &Lines, expected: &str) {
 
             eprintln!("{actual}");
 
+            eprintln!("Backtrace:");
             for frame in e.stack.iter() {
-                eprintln!("{:?}", frame.func());
-                eprint!("  (");
+                let func = frame.func();
+                eprint!("  {} (", func.name());
                 for arg in frame.args().iter() {
                     eprint!("{:?},", arg);
                 }