patch 8.0.0052
Problem:    Conceal test passes even without the bug fix.
Solution:   Add a redraw command. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index a6f915a..5e337d6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    52,
+/**/
     51,
 /**/
     50,