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)
diff --git a/src/fileio.c b/src/fileio.c
index c7e846b..0843d04 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4877,6 +4877,13 @@
 	    )
     {
 	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);
     }
diff --git a/src/version.c b/src/version.c
index 6953814..378818e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    493,
+/**/
     492,
 /**/
     491,