vim-patch:8.2.2328: some test files may not be deleted (#21194)

Problem:    Some test files may not be deleted.
Solution:   Add a delete() call, correct name. (Dominique Pellé, closes vim/vim#7654)

48e11c1054

src/nvim/testdir/test_clientserver.vim

@@ -87,6 +87,7 @@ func Test_client_server()
   call writefile(['one', 'two'], 'Xclientfile')
   call system(cmd)
   call WaitForAssert({-> assert_equal('two', remote_expr(name, "getline(2)", "", 2))})
+  call delete('Xclientfile')
 
   " Expression evaluated locally.
   if v:servername == ''