#22903 Fix code snippeds

* move scala and java sources out of paradox sources
* replace relative paths with $code$ and $akka$
* fix broken includes

akka-docs/src/main/scala/docs/stream/cookbook/RecipeDecompress.scala

@@ -0,0 +1,40 @@
+/**
+ * Copyright (C) 2016-2017 Lightbend Inc. <http://www.lightbend.com/>
+ */
+package docs.stream.cookbook
+
+import java.io.ByteArrayOutputStream
+import java.nio.charset.StandardCharsets
+import java.util.zip.GZIPOutputStream
+
+import akka.stream.impl.io.compression.GzipCompressor
+import akka.stream.scaladsl.Sink
+import akka.stream.scaladsl.Source
+import akka.util.ByteString
+
+import scala.annotation.tailrec
+import scala.concurrent.Await
+import scala.concurrent.duration._
+
+class RecipeDecompress extends RecipeSpec {
+  def gzip(s: String): ByteString = {
+    val buf = new ByteArrayOutputStream()
+    val out = new GZIPOutputStream(buf)
+    try out.write(s.getBytes(StandardCharsets.UTF_8)) finally out.close()
+    ByteString(buf.toByteArray)
+  }
+
+  "Recipe for decompressing a Gzip stream" must {
+    "work" in {
+      val compressed = Source.single(gzip("Hello World"))
+
+      //#decompress-gzip
+      import akka.stream.scaladsl.Compression
+      val uncompressed = compressed.via(Compression.gunzip())
+        .map(_.utf8String)
+      //#decompress-gzip
+
+      Await.result(uncompressed.runWith(Sink.head), 3.seconds) should be("Hello World")
+    }
+  }
+}