vim-patch:7.4.857

Problem:    Dragging the current tab with the mouse doesn't work properly.
Solution:   Take the current tabpage index into account. (Hirohito Higashi)

4a4b821085

src/nvim/version.c

@@ -431,7 +431,7 @@ static int included_patches[] = {
   // 860,
   // 859,
   858,
-  // 857,
+  857,
   // 856,
   // 855 NA
   // 854 NA