patch 8.0.0727: message about what register to yank into is not translated

Problem:    Message about what register to yank into is not translated.
            (LemonBoy)
Solution:   Add _().
diff --git a/src/version.c b/src/version.c
index 85814a4..77ff8c7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    727,
+/**/
     726,
 /**/
     725,