[ASYNC-167] Fix docstring for put! and friends Created: 27/Apr/16 Updated: 27/Apr/16
The docstring for `put!` and friends is misleading and incorrect. They repeatedly mention "port" where the user knows only the term "channel".
Also, description of `fn0` is missing & incorrect. The phrase "Will throw if closed" is incorrect. fn0 is called with a single arg, which is `true` upon success and `false` if the channel is closed.