The automatic replacement produces Markdown that caused the paradox task in sbt to timeout or event fail. So

this commit removes some operators with outpu too complex:

- ignored operators:
          "ask.md",
          "alsoTo.md",
          "batchWeighted.md",
          "buffer.md",
          "actorRef.md",
          "collect.md",
          "collection.md",
          "combine.md",
          "completionTimeout.md",
          "concat.md",
          "from.md",
          "fromMaterializer.md",
          "map.md",
          "merge.md",
          "queue.md",
          "log.md", // too many overloads, breaks `paradox` task
          "throttle.md", // too many overloads, breaks `paradox` task
          "idleTimeout.md", // too many overloads, breaks `paradox` task
          "setup.md",
          "watch.md",
          "withBackoff.md",
          "zip.md",
          "zipWith.md",
          "actorRefWithBackpressure.md"

- Ignored class when FQCN contains: Implicits, FlowOpsMat, SubSource, FlowOps, SubFlow, WithContext, DelayStrategy

- some extra manual cleanup on the committed operators.

akka-docs/src/main/paradox/stream/operators/Source/fromJavaStream.md

@@ -4,13 +4,10 @@ Stream the values from a Java 8 `Stream`, requesting the next value when there i
 
 @ref[Source operators](../index.md#source-operators)
 
-@@@div { .group-scala }
-
 ## Signature
 
-@@signature [Source.scala](/akka-stream/src/main/scala/akka/stream/scaladsl/Source.scala) { #fromJavaStream }
+@apidoc[StreamConverters.fromJavaStream](StreamConverters$) { scala="#fromJavaStream[T,S<:java.util.stream.BaseStream[T,S]](stream:()=>java.util.stream.BaseStream[T,S]):akka.stream.scaladsl.Source[T,akka.NotUsed]" java="#fromJavaStream(akka.japi.function.Creator)" }
 
-@@@
 
 ## Description