patch 7.4.1154
Problem:    No support for JSON.
Solution:   Add jsonencode() and jsondecode().  Also add v:false, v:true,
            v:null and v:none.
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index e89afb4..aceb073 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -5,6 +5,7 @@
 source test_cursor_func.vim
 source test_delete.vim
 source test_expand.vim
+source test_json.vim
 source test_lispwords.vim
 source test_menu.vim
 source test_searchpos.vim