patch 7.4.1981
Problem:    No testing for Farsi code.
Solution:   Add a minimal test.  Clean up Farsi code.
diff --git a/src/Makefile b/src/Makefile
index 668f900..79e2992 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2022,6 +2022,7 @@
 	test_expand_dllpath \
 	test_expr \
 	test_expr_utf8 \
+	test_farsi \
 	test_feedkeys \
 	test_file_perm \
 	test_fnamemodify \