updated for version 7.3.290

Problem:    When a BufWriteCmd autocommand resets 'modified' this doesn't
            change older buffer states to be marked as 'modified' like
            ":write" does.  (Yukihiro Nakadaira)
Solution:   When the BufWriteCmd resets 'modified' then adjust the undo
            information like ":write" does.

src/fileio.c

@@ -3342,8 +3342,22 @@ buf_write(buf, fname, sfname, start, end, eap, append, forceit,
 	}
 	else if (reset_changed && whole)
 	{
-	    if (!(did_cmd = apply_autocmds_exarg(EVENT_BUFWRITECMD,
+	    int was_changed = curbufIsChanged();
-					 sfname, sfname, FALSE, curbuf, eap)))
+
+	    did_cmd = apply_autocmds_exarg(EVENT_BUFWRITECMD,
+					  sfname, sfname, FALSE, curbuf, eap);
+	    if (did_cmd)
+	    {
+		if (was_changed && !curbufIsChanged())
+		{
+		    /* Written everything correctly and BufWriteCmd has reset
+		     * 'modified': Correct the undo information so that an
+		     * undo now sets 'modified'. */
+		    u_unchanged(curbuf);
+		    u_update_save_nr(curbuf);
+		}
+	    }
+	    else
 	    {
 #ifdef FEAT_QUICKFIX
 		if (overwriting && bt_nofile(curbuf))

src/version.c

@@ -709,6 +709,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    290,
 /**/
     289,
 /**/