patch 8.1.0132: lua tests are old style

Problem:    Lua tests are old style.
Solution:   Convert to new style tests.  Improve coverage. (Dominique Pelle,
            closes #3091)
diff --git a/src/Makefile b/src/Makefile
index e9a15a0..ad90451 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2119,7 +2119,7 @@
 	test52 test59 \
 	test64 test69 \
 	test70 test72 \
-	test85 test86 test87 test88 \
+	test86 test87 test88 \
 	test94 test95 test99 test108:
 	cd testdir; rm -f $@.out; $(MAKE) -f Makefile $@.out VIMPROG=../$(VIMTESTTARGET) $(GUI_TESTARG) SCRIPTSOURCE=../$(SCRIPTSOURCE)