The module doc had grown a 37-line preamble carrying three separate
arguments, which the comment-block lint refuses. Splitting it is the
better fix than raising the limit: the reader who is about to widen a
subject list meets the reason not to at the list, not seven screens up.
Also corrects one claim I had no measurement for. The CREATE note said
creating an existing stream with a different config "is an error rather
than a rewrite" — asserted, not observed. What is observed is narrower
and enough: a hive holding this grant leaves the stream config untouched
and never publishes $JS.API.STREAM.UPDATE at all.
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