vim-patch:8.2.2360: test leaves file behind

Problem:    Test leaves file behind.
Solution:   Delete the right file. (Dominique Pellé, closes vim/vim#7689)
https://github.com/vim/vim/commit/a3b494d6afa79aedce42fa4ecc7ef0dbae79e37e

src/nvim/testdir/test_filetype.vim

@@ -716,7 +716,7 @@ func Test_pp_file()
   call assert_equal('pascal', &filetype)
   bwipe!
 
-  call delete('Xfile.ts')
+  call delete('Xfile.pp')
   filetype off
 endfunc