patch 8.2.3453: autocmd not executed when editing a directory

Problem:    Autocmd not executed when editing a directory ending in a path
            separator inside try block.
Solution:   Return NOTDONE instead of FAIL. (closes #8885)
diff --git a/src/fileio.c b/src/fileio.c
index eb46f1f..1767e5e 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -338,7 +338,7 @@
 	    filemess(curbuf, fname, (char_u *)_(msg_is_a_directory), 0);
 	    msg_end();
 	    msg_scroll = msg_save;
-	    return FAIL;
+	    return NOTDONE;
 	}
     }
 
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index b2e4952..f769eec 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
Binary files differ
diff --git a/src/version.c b/src/version.c
index 8417acd..b113088 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3453,
+/**/
     3452,
 /**/
     3451,