patch 8.2.0052: more-prompt not properly tested

Problem:    More-prompt not properly tested.
Solution:   Add a test case. (Dominique Pelle, closes #5404)
diff --git a/src/version.c b/src/version.c
index b8c4870..9d8c3a0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    52,
+/**/
     51,
 /**/
     50,