update docs

Author: puredanger

docs/flow-guide.html

@@ -21,7 +21,7 @@ <h3><a href="#transition-step-fn-state-transition-state" id="transition-step-fn-
 <p>The transition arity is called any time the flow or process undergoes a lifecycle transition (::flow/start, ::flow/stop, ::flow/pause, ::flow/resume). The transition arity takes the current state and returns an updated state to be used for subsequent calls.</p>
 <p>The step-fn should use the transition arity to coordinate the creation, pausing, and shutdown of external resources in a process.</p>
 <h3><a href="#transform-step-fn-state-input-msg-state-out-id-msgs" id="transform-step-fn-state-input-msg-state-out-id-msgs"></a>transform: <code>(step-fn state input msg) -&gt; [state' {out-id [msgs]}]</code></h3>
-<p>The transform arity is called in a loop by the process for every message received on an input channel and returns a new state and a map of output cids to messages to return. The process will take care of sending these messages to the output channels. Output can be sent to none, any or all of the :outsenumerated, and/or an input named by a <a href="pid inid">pid inid</a> tuple (e.g. for reply-to), and/or to the ::flow/report output. A step need not output at all (output or msgs can be empyt/nil), however an output <em>message</em> may never be nil (per core.async channels).</p>
+<p>The transform arity is called in a loop by the process for every message received on an input channel and returns a new state and a map of output cids to messages to return. The process will take care of sending these messages to the output channels. Output can be sent to none, any or all of the :outs enumerated, and/or an input named by a <a href="pid inid">pid inid</a> tuple (e.g. for reply-to), and/or to the ::flow/report output. A step need not output at all (output or msgs can be empyt/nil), however an output <em>message</em> may never be nil (per core.async channels).</p>
 <p>The step-fn may throw exceptions from any arity and they will be handled by flow. If exceptions are thrown from the transition or transform arities, the exception will be logged on the flow’s :error-chan.</p>
 <h3><a href="#process-state" id="process-state"></a>Process state</h3>
 <p>The process state is a map. It can contain any keys needed by the step-fn transition and transform arities. In addition, there are some flow-specific keys, described here.</p>