patch 8.0.0684: old style tests are not nice

Problem:    Old style tests are not nice.
Solution:   Turn two tests into new style. (pschuh, closes #1797)
diff --git a/src/version.c b/src/version.c
index a5f6f18..48c62a4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    684,
+/**/
     683,
 /**/
     682,