Merge pull request #23 from Kotlin/fix_spark_output

Fix jupyter-lab issue

Author: nikitinas

src/main/kotlin/org/jetbrains/kotlin/jupyter/connection.kt

@@ -31,7 +31,6 @@ class JupyterConnection(val config: KernelConfig): Closeable {
             connection.iopub.send(makeReplyMessage(msg, "status", content = jsonObject("execution_state" to status)))
         }
 
-        //fun send
         fun sendWrapped(incomingMessage: Message, msg: Message) {
             sendStatus("busy", incomingMessage)
             send(msg)

src/main/kotlin/org/jetbrains/kotlin/jupyter/protocol.kt

@@ -25,16 +25,22 @@ fun JupyterConnection.Socket.shellMessagesHandler(msg: Message, repl: ReplForJup
     when (msgType) {
         "kernel_info_request" ->
             sendWrapped(msg, makeReplyMessage(msg, "kernel_info_reply",
-                content = jsonObject(
-                        "protocol_version" to protocolVersion,
-                        "language" to "Kotlin",
-                        "language_version" to KotlinCompilerVersion.VERSION,
-                        "language_info" to jsonObject(
-                                "name" to "kotlin",
-                                "codemirror_mode" to "text/x-kotlin",
-                                "file_extension" to "kt"
-                        )
-                )))
+                    content = jsonObject(
+                            "protocol_version" to protocolVersion,
+                            "language" to "Kotlin",
+                            "language_version" to KotlinCompilerVersion.VERSION,
+                            "language_info" to jsonObject(
+                                    "name" to "kotlin",
+                                    "codemirror_mode" to "text/x-kotlin",
+                                    "file_extension" to "kt"
+                            ),
+
+                            // Jupyter lab Console support
+                            "banner" to "Kotlin language, version ${KotlinCompilerVersion.VERSION}",
+                            "implementation" to "Kotlin",
+                            "implementation_version" to KotlinCompilerVersion.VERSION,
+                            "status" to "ok"
+                    )))
         "history_request" ->
             sendWrapped(msg, makeReplyMessage(msg, "history_reply",
                     content = jsonObject(