patch 8.0.0011
Problem:    On OSX Test_pipe_through_sort_all() sometimes fails.
Solution:   Add the test to the list of flaky tests.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 074ee57..a3b5ea9 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -148,6 +148,7 @@
       \ 'Test_reltime()',
       \ 'Test_nb_basic()',
       \ 'Test_communicate()',
+      \ 'Test_pipe_through_sort_all()'
       \ 'Test_pipe_through_sort_some()'
       \ ]