vim-patch:7.4.2219

Problem:    Recursive call to substitute gets stuck in sandbox. (Nikolai
            Pavlov)
Solution:   Handle the recursive call. (Christian Brabandt, closes vim/vim#950)
            Add a test.

f5a39447a8

Closes #5118

src/nvim/version.c

@@ -75,6 +75,7 @@ static char *features[] = {
 
 // clang-format off
 static int included_patches[] = {
+  2219,
   // 2200,
   // 2199,
   // 2198,