vim-patch:8.1.2218: "gN" is off by one in Visual mode

Problem:    "gN" is off by one in Visual mode.
Solution:   Check moving forward. (Christian Brabandt, vim/vim#5075)
453c19257f

src/nvim/search.c

@@ -4118,7 +4118,7 @@ current_search(
 
   // put cursor on last character of match
   curwin->w_cursor = end_pos;
-  if (lt(VIsual, end_pos)) {
+  if (lt(VIsual, end_pos) && forward) {
     dec_cursor();
   } else if (VIsual_active && lt(curwin->w_cursor, VIsual)) {
     curwin->w_cursor = pos;   // put the cursor on the start of the match
@@ -4147,7 +4147,7 @@ current_search(
   return OK;
 }
 
-/// Check if the pattern is one character long or zero-width.
+/// Check if the pattern is zero-width.
 /// If move is true, check from the beginning of the buffer,
 /// else from position "cur".
 /// "direction" is FORWARD or BACKWARD.

src/nvim/testdir/test_gn.vim

@@ -149,6 +149,11 @@ func Test_gn_command()
   norm! gg0f7vhhhhgnd
   call assert_equal(['12348'], getline(1,'$'))
   sil! %d _
+  call setline('.', ['12345678'])
+  let @/ = '5'
+  norm! gg0f2vf7gNd
+  call assert_equal(['1678'], getline(1,'$'))
+  sil! %d _
 
   set wrapscan&vim
   set belloff&vim

src/nvim/version.c

@@ -68,6 +68,7 @@ NULL
 
 // clang-format off
 static const int included_patches[] = {
+  2218,
   2207,
   2173,
   1850,