vim-patch:8.2.0416: test leaves file behind

Problem:    Test leaves file behind.
Solution:   Delete the file.
95e59a355b

src/nvim/testdir/test_indent.vim

@@ -157,10 +157,12 @@ func Test_modeline_indent_expr()
   call assert_equal('GetIndent()', &indentexpr)
   exe "normal Oa\nb\n"
   call assert_equal(['  a', '    b'], getline(1, 2))
+
   set modelineexpr&
   delfunc GetIndent
   let &modeline = modeline
   close!
+  call delete('Xfile.txt')
 endfunc
 
 " vim: shiftwidth=2 sts=2 expandtab