vim-patch:8.0.0672: synconcealed() changes too often #7887

Problem:    Third item of synconcealed() changes too often. (Dominique Pelle)
Solution:   Reset the sequence number at the start of each line.
cc0750dc6e

closes #7589

src/nvim/version.c

@@ -825,7 +825,7 @@ static const int included_patches[] = {
   // 675,
   // 674,
   // 673,
-  // 672,
+  672,
   // 671,
   // 670,
   // 669,