patch 8.1.0363: internal diff isn't used by default as advertised commit https://github.com/vim/vim/commit/c93262b2e3fb043c685bd4014a35a29111dea484 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Sep 10 21:15:40 2018 +0200 patch 8.1.0363: internal diff isn't used by default as advertised Problem: Internal diff isn't used by default as advertised. Solution: Add "internal" to the default value of 'diffopt'. Also add couple of files missing from the distribution.

--- a/src/option.c
+++ b/src/option.c
@@ -1049,7 +1049,7 @@ static struct vimoption options[] =
 								     |P_NODUP,
 #ifdef FEAT_DIFF
 			    (char_u *)&p_dip, PV_NONE,
-			    {(char_u *)"filler", (char_u *)NULL}
+			    {(char_u *)"internal,filler", (char_u *)NULL}
 #else
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)"", (char_u *)NULL}