:art: Grammar improv

diff --git a/ast b/ast
index 61869ebbd4e91ce188e6298ff1542b1288977e73..940fc44dee9ed5afa0e4226498eddb49f92a349b 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 61869ebbd4e91ce188e6298ff1542b1288977e73
+Subproject commit 940fc44dee9ed5afa0e4226498eddb49f92a349b