patch 7.4.1838
Problem:    Functions specifically for testing do not sort together.
Solution:   Rename garbagecollect_for_testing() to test_garbagecollect_now().
            Add test_null_list(), test_null_dict(), etc.
diff --git a/src/version.c b/src/version.c
index f1bbbdd..46aff53 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1838,
+/**/
     1837,
 /**/
     1836,