Comment 4 for bug 1904257

And for posterity: arguably the standard is inconsistent here, in that the dictionary entry for SYNONYM-STREAM reads ``Any operations on a synonym stream will be performed on the stream that is then the value of the dynamic variable named by the synonym stream symbol.''

So any implementor needs to decide whether to privilege that sentence over the passage in CLOSE, ``The effect of CLOSE on a constructed stream is to close the argument STREAM only. There is no effect on the constituents of composite streams.''