have builtins return :nil when appropriate

1 files changed, 2 insertions, 2 deletions

diff --git a/neb/std/repl.py b/neb/std/repl.py
index 0274e48..2979c5b 100644
--- a/neb/std/repl.py
+++ b/neb/std/repl.py
@@ -15,9 +15,9 @@ def interpretHowTo(symbol, args, env, ns):
         print(des)
     else:
         print("\n".join(des))
-    return List([])
+    return Nil()
 
-howto_func = Builtin("howto", interpretHowTo, [Arg("symbol", TypeEnum.ANY)], return_type=Type(":list"))
+howto_func = Builtin("howto", interpretHowTo, [Arg("symbol", TypeEnum.ANY)], return_type=Type(":nil"))
 howto_multi = MultiFunction("howto")
 howto_multi.register(howto_func)
 REPL.register("howto", howto_multi)