=doc, htp minor fixes in docs and tests

akka-http-core/src/test/scala/akka/http/impl/engine/ws/MessageSpec.scala

@@ -302,7 +302,7 @@ class MessageSpec extends FreeSpec with Matchers with WithMaterializerSpec {
         }
         "for a streamed message don't convert half surrogate pairs naively" in new ServerTestSetup {
           val gclef = "𝄞"
-          gclef.size shouldEqual 2
+          gclef.length shouldEqual 2
 
           // split up the code point
           val half1 = gclef.take(1)

akka-http-core/src/test/scala/akka/http/impl/engine/ws/WebsocketServerSpec.scala

@@ -37,8 +37,7 @@ class WebsocketServerSpec extends FreeSpec with Matchers with WithMaterializerSp
 
           val request = expectRequest
           val upgrade = request.header[UpgradeToWebsocket]
-          upgrade.isDefined shouldBe
-            true
+          upgrade.isDefined shouldBe true
 
           val source =
             Source(List(1, 2, 3, 4, 5)).map(num ⇒ TextMessage.Strict(s"Message $num"))