patch 8.0.1184: the :marks command is not tested

Problem:    The :marks command is not tested.
Solution:   Add a test. (Dominique Pelle, closes #2197)
diff --git a/src/version.c b/src/version.c
index bbdf361..25df81c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1184,
+/**/
     1183,
 /**/
     1182,