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be compatible with more Scala versions #33
Merged
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see scala/scala#4640 for details.
in that PR (targeted for 2.12.0-M3), we are making a binary
incompatible change to Stream. by avoiding using Stream at all here,
we avoid running afoul of the incompatibility.
Stream is arguably overkill here anyway, Iterator is just fine.
so there's no need to change the code back after we're over
the M2/M3 incompatibility hump.