vim-patch:7.4.665, 671

Problem:    'linebreak' does not work properly with multi-byte characters.
Solution:   Compute the pointer offset with mb_head_off().  (Yasuhiro
            Matsumoto)

76feaf1bfe

Problem:    Warning for shadowing a variable.
Solution:   Rename off to mb_off. (Kazunobu Kuriyama)

4df702999d

src/nvim/version.c

@@ -322,13 +322,13 @@ static int included_patches[] = {
   // 674 NA
   673,
   // 672,
-  // 671,
+  671,
   670,
   // 669 NA
   668,
   667,
   // 666 NA
-  // 665,
+  665,
   // 664 NA
   // 663 NA
   // 662,