better echo

src/stl/strings.rs

@@ -22,12 +22,11 @@ pub const ECHO_DOCSTRING: &str =
     "traverses any number of arguments. Prints their evaluated values on a new line for each.";
 
 pub fn echo_callback(ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
-    if ast.len() == 1 {
-        println!("{}", ast.car);
-    } else {
-        ast.circuit(&mut |arg: &Ctr| print!("{}", arg) == ());
-    }
-
+    ast.circuit(&mut |arg: &Ctr| match arg {
+        Ctr::String(s) => print!("{}", s) == (),
+        _ => print!("{}", arg) == (),
+    });
+    println!();
     Ok(Ctr::None)
 }