vim-patch:8.0.0518

Closes #7086

Problem:    Storing a zero byte from a multi-byte character causes fold text
            to show up wrong.
Solution:   Avoid putting zero in ScreenLines. (Christian Brabandt,
            closes vim/vim#1567)

c6cd8409c2

src/nvim/version.c

@@ -434,7 +434,7 @@ static const int included_patches[] = {
   // 521,
   // 520,
   // 519,
-  // 518,
+  518,
   // 517,
   // 516,
   // 515,