patch 8.2.2563: cannot use multibyte characters for folding in 'fillchars'

Problem:    Cannot use multibyte characters for folding in 'fillchars'.
Solution:   Port pull request 11568 to Vim. (Yegappan Lakshmanan,
            closes #7924)
diff --git a/src/testdir/test_profile.vim b/src/testdir/test_profile.vim
index 835a602..785cee3 100644
--- a/src/testdir/test_profile.vim
+++ b/src/testdir/test_profile.vim
@@ -636,6 +636,8 @@
   call assert_match('FUNCTION  <SNR>\d\+_Two().*'
         \ .. '#Called 3 times.*'
         \ .. '#    3 \s*[0-9.]\+   total += nr', prof_lines)
+  call delete('Xprofile_nested.vim')
+  call delete('Xprofile_nested.log')
 endfunc