Fix indentation in index
Merge pull request #352 from eric/making-indentation-match

Fix indentation in index
transport.sse: formatting
SSE transport test: fix timing dependency

This relied on a race condition *and* a bug in the creation of the index
wrapper; both bugs were fragile and masked the other. Now we create the
index wrapper with a pubsub registry, and use the blocking lamina
channel->lazy-seq variant for dequeues.