Incorrect comment in protocol Service, start-service.

[kasterma]

In line
https://github.com/Datomic/simulant/blob/master/src/simulant/sim.clj#L85
(doto (create-service ...) (start-service))

Since doto is used, the result of (create-service) is returned after (start-service) is called on it. This is not what is documented at
https://github.com/Datomic/simulant/blob/master/src/simulant/sim.clj#L69

where is states that the return value of start-service is assigned to the services map. I prefer the documented version over the implemented one, but clearly this could not be fixed while maintaining backward compatibility. So maybe just update the doc?

[mtnygard]

Sorry, but I had to make the code match the documentation, rather than the other way around. The reason is that start-service isn't just about side effects. It also has the chance to attach any information needed to finalize the service later. (E.g., system resources, log file names, etc.)