patch 8.0.1464: completing directory after :find does not add slash

Problem:    Completing directory after :find does not add slash.
Solution:   Adjust the flags for globpath(). (Genki Sky)
diff --git a/src/testdir/test_find_complete.vim b/src/testdir/test_find_complete.vim
index 4732109..a7bc135 100644
--- a/src/testdir/test_find_complete.vim
+++ b/src/testdir/test_find_complete.vim
@@ -86,6 +86,12 @@
   call feedkeys(":find f\t\n", "xt")
   call assert_equal('Holy Grail', getline(1))
 
+  " Test that find completion on directory appends a slash
+  call feedkeys(":find in/pa\tfile.txt\n", "xt")
+  call assert_equal('E.T.', getline(1))
+  call feedkeys(":find ./i\tstuff.txt\n", "xt")
+  call assert_equal('Another Holy Grail', getline(1))
+
   " Test shortening of
   "
   "    foo/x/bar/voyager.txt