patch 8.0.0126
Problem:    Display problem with 'foldcolumn' and a wide character.
            (esiegerman)
Solution:   Don't use "extra" but an allocated buffer. (Christian Brabandt,
            closes #1310)
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 17c70f3..c78e34b 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -148,6 +148,7 @@
 	    test_cscope.res \
 	    test_diffmode.res \
 	    test_digraph.res \
+	    test_display.res \
 	    test_farsi.res \
 	    test_fnameescape.res \
 	    test_gf.res \