patch 8.2.3096: temp files remain after running tests

Problem:    Temp files remain after running tests.
Solution:   Delete the right files. (Dominique Pellé, closes #8509)
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
index 3df6533..1092951 100644
--- a/src/testdir/test_visual.vim
+++ b/src/testdir/test_visual.vim
@@ -1262,7 +1262,7 @@
   " clean up
   call term_sendkeys(buf, "\<Esc>")
   call StopVimInTerminal(buf)
-  call delete('XTest_beval')
+  call delete('XTest_block')
 endfunc