closes #2013: Typos in the docs, using parens for arity-0 methods which are not referentially transparent

akka-docs/general/actor-systems.rst

@@ -29,7 +29,7 @@ The quintessential feature of actor systems is that tasks are split up and
 delegated until they become small enough to be handled in one piece. In doing
 so, not only is the task itself clearly structured, but the resulting actors
 can be reasoned about in terms of which messages they should process, how they
-should react nominally and how failure should be handled. If one actor does not
+should react normally and how failure should be handled. If one actor does not
 have the means for dealing with a certain situation, it sends a corresponding
 failure message to its supervisor, asking for help. The recursive structure
 then allows to handle failure at the right level.
@@ -41,7 +41,7 @@ trying to keep everything “under the carpet”.
 
 Now, the difficulty in designing such a system is how to decide who should
 supervise what. There is of course no single best solution, but there are a few
-guide lines which might be helpful:
+guidelines which might be helpful:
 
  - If one actor manages the work another actor is doing, e.g. by passing on
    sub-tasks, then the manager should supervise the child. The reason is that

akka-tutorials/akka-tutorial-first/src/main/scala/akka/tutorial/first/scala/Pi.scala

@@ -49,7 +49,7 @@ object Pi extends App {
 
     var pi: Double = _
     var nrOfResults: Int = _
-    val start: Long = System.currentTimeMillis
+    val start: Long = System.currentTimeMillis()
 
     //#create-router
     val workerRouter = context.actorOf(
@@ -66,7 +66,7 @@ object Pi extends App {
         nrOfResults += 1
         if (nrOfResults == nrOfMessages) {
           // Send the result to the listener
-          listener ! PiApproximation(pi, duration = (System.currentTimeMillis - start).millis)
+          listener ! PiApproximation(pi, duration = (System.currentTimeMillis() - start).millis)
           // Stops this actor and all its supervised children
           context.stop(self)
         }