?????????? #4187 ????????????????????? (by Shugo Maeda)

????????? Open??????Closed???????
???? % 0??????100???????

This issue was solved with changeset r30544.
Kazuhiro, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

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* test/net/imap/test_imap.rb: call neither logout nor disconnect
  unless connected.  patch by Kazuhiro NISHIYAMA.  [ruby-dev:42860]
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