from preamble:

"Change Set:		StreamClosedFix
Date:			28 August 2003
Author:			Avi Bryant

Stream implements #closed for compatibility with FileStream.  However,
this method is inconsistently implemented in the Stream hierarchy:
ReadWriteStream implements it to return false, as does
GZipSurrogateStream, but the abstract Stream superclass implements it to
return true.

This means, in particular, that ReadStreams are always considered
closed, which leads to problems when using them with ZipArchive.

This changeset modifies Stream>>closed to return false.  There may be
some reason this is a bad idea, but I'm submitting this fix to at least
start the discussion.
"!
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