misc: display function as nebulous blob

src/evaluator/mod.rs

@@ -66,11 +66,11 @@ impl std::fmt::Display for Expression {
             }
 
             Expression::Function {
-                params: args,
+                params: _,
                 env: _,
                 body: _,
             } => {
-                write!(f, "(fn* ({}) /body/)", args.join(" "))
+                write!(f, "#<function>")
             }
 
             Expression::NativeFunc(func) => write!(f, "{func:?}"),