patch 7.4.1686
Problem:    When running tests $HOME/.viminfo is written. (James McCoy)
Solution:   Add 'nviminfo' to the 'viminfo' option. (closes #722)
diff --git a/src/version.c b/src/version.c
index 1b34431..f2976cb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1686,
+/**/
     1685,
 /**/
     1684,