Do not attempt to lookup functions in expects

Functions are not useful to print in expect results, because they are
only printed opaquely as `<function>`. Moreover, their transformation to
closure sets during mono can be extremely lossy, up to and including the
elision of symbols for function closure symbols. As such, simply do not
attempt to lookup or print functions referenced in expects.

Closes #4389

crates/repl_expect/src/lib.rs

@@ -923,13 +923,34 @@ mod test {
 
                 When it failed, these variables had these values:
 
-                forcer : Str -> U8
-                forcer = <function>
-
                 case : Str
                 case = ""
                 "#
             ),
         );
     }
+
+    #[test]
+    fn issue_i4389() {
+        run_expect_test(
+            indoc!(
+                r#"
+                interface Test exposes [] imports []
+
+                expect
+                    totalCount = \{} -> 1u8
+                    totalCount {} == 96u8
+                "#
+            ),
+            indoc!(
+                r#"
+                This expectation failed:
+
+                3│>  expect
+                4│>      totalCount = \{} -> 1u8
+                5│>      totalCount {} == 96u8
+                "#
+            ),
+        );
+    }
 }