[ast] Change printing of {Variable::maybe_assigned}.

src/ast/scopes.cc

Index: src/ast/scopes.cc
diff --git a/src/ast/scopes.cc b/src/ast/scopes.cc
index c3cab48d6e3ad9e6ecb4b6deb17187436aa7b6b7..c150336668545eb1a8bf78b3af3823f70bb476c1 100644
--- a/src/ast/scopes.cc
+++ b/src/ast/scopes.cc
@@ -1380,9 +1380,9 @@ static void PrintVar(int indent, Variable* var) {
       PrintF("forced context allocation");
       comma = true;
     }
-    if (var->maybe_assigned() == kMaybeAssigned) {
+    if (var->maybe_assigned() == kNotAssigned) {
       if (comma) PrintF(", ");
-      PrintF("maybe assigned");
+      PrintF("never assigned");
     }
     PrintF("\n");
   }