vim-patch:7.4.717

Problem:    ":let list += list" can change a locked list.
Solution:   Check for the lock earlier. (Olaf Dabrunz)

1cd5e613b0

src/nvim/version.c

@@ -571,7 +571,7 @@ static int included_patches[] = {
   // 720 NA
   719,
   718,
-  // 717,
+  717,
   716,
   715,
   714,