updated for version 7.4.493

Problem:    A TextChanged autocommand is triggered when saving a file.
            (William Gardner)
Solution:   Update last_changedtick after calling unchanged(). (Christian
            Brabandt)

src/fileio.c

@@ -4877,6 +4877,13 @@ restore_backup:
 	    )
     {
 	unchanged(buf, TRUE);
+#ifdef FEAT_AUTOCMD
+	/* buf->b_changedtick is always incremented in unchanged() but that
+	 * should not trigger a TextChanged event. */
+	if (last_changedtick + 1 == buf->b_changedtick
+					       && last_changedtick_buf == buf)
+	    last_changedtick = buf->b_changedtick;
+#endif
 	u_unchanged(buf);
 	u_update_save_nr(buf);
     }

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    493,
 /**/
     492,
 /**/