:art: Allow space before stringified macro argument

diff --git a/ast b/ast
index edf503c3ffa210ad6f2ac72d57b92315f35f1335..126cdeb142c8764f331c530ad0cf15494d129c73 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit edf503c3ffa210ad6f2ac72d57b92315f35f1335
+Subproject commit 126cdeb142c8764f331c530ad0cf15494d129c73