patch 8.1.2390: test94 is old style, fix 7.4.441 not tested

Problem:    Test94 is old style, fix 7.4.441 not tested.
Solution:   Turn test94 into a new style test.  Add tests for the fix in patch
            7.4.441. (Yegappan Lakshmanan, closes #5316)
diff --git a/src/Makefile b/src/Makefile
index e0926a6..6c7c373 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2257,7 +2257,7 @@
 	test64 test69 \
 	test70 test72 \
 	test86 test87 test88 \
-	test94 test95 test99:
+	test95 test99:
 	cd testdir; rm -f $@.out; $(MAKE) -f Makefile $@.out VIMPROG=../$(VIMTESTTARGET) $(GUI_TESTARG) SCRIPTSOURCE=../$(SCRIPTSOURCE)
 
 # Run individual NEW style test.