        doc/directive2.md fenced blocks
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block    line  test      TEXT or directive
type   number  role      quoted and one per line
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py3        14  setup     -setup
py3        25  code
           32  output
py3        42  code
           47  output
py3        52  code
           56  output
py3        64  teardown  -teardown
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3 test cases.
