turned back some overeager environment passing

Eval.pm

@@ -138,7 +138,7 @@ sub call_form {
                 return $result;
         };
         backto_environment($saved_env);
-        # return error after restoring bindungs
+        # return error after restoring bindings
         unless (defined($result)) {
                 say("$eval_depth: ", princs(cons(function_name($func),
                                                  $orig_args)))
@@ -215,9 +215,8 @@ sub eval_count {
 }
 
 sub Eval {
-        my ($ob, $env) = @_;
+        my ($ob) = @_;
         #debugl("eval expr: %s", $ob);
-        $env //= $Env;
 
         $eval_depth++;
         $eval_counter++;