* test/testunit/test_parallel.rb (teardown): this code seems to allow
  `Errno::EPIPE` from @worker_in.  in such case, `close` may also raise the same
  exception.
  I'm not confident in this conclusion and still doubt that we should revert
  r60417 instead of this commit or not.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60428 b2dd03c8-39d4-4d8f-98ff-823fe69b080e