move code snippets into compiled files for duration.rst, see #2462

akka-docs/common/code/docs/duration/Java.java

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+/**
+ *  Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package docs.duration;
+
+//#import
+import scala.concurrent.util.Duration;
+import scala.concurrent.util.Deadline;
+//#import
+
+class Java {
+  public void demo() {
+    //#dsl
+    final Duration fivesec = Duration.create(5, "seconds");
+    final Duration threemillis = Duration.parse("3 millis");
+    final Duration diff = fivesec.minus(threemillis);
+    assert diff.lt(fivesec);
+    assert Duration.Zero().lt(Duration.Inf());
+    //#dsl
+    //#deadline
+    final Deadline deadline = Duration.create(10, "seconds").fromNow();
+    final Duration rest = deadline.timeLeft();
+    //#deadline
+  }
+}

akka-docs/common/code/docs/duration/Sample.scala

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+/**
+ *  Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package docs.duration
+
+object Scala {
+  //#dsl
+  import scala.concurrent.util.duration._ // notice the small d
+
+  val fivesec = 5.seconds
+  val threemillis = 3.millis
+  val diff = fivesec - threemillis
+  assert(diff < fivesec)
+  val fourmillis = threemillis * 4 / 3 // though you cannot write it the other way around
+  val n = threemillis / (1 millisecond)
+  //#dsl
+
+  //#deadline
+  val deadline = 10.seconds.fromNow
+  // do something
+  val rest = deadline.timeLeft
+  //#deadline
+}