call metadata methods on abort replies

ensures aborted messages have consistent metadata with real replies

Author: minrk

ipykernel/kernelbase.py

@@ -354,7 +354,7 @@ async def dispatch_shell(self, msg):
                 self.log.error("Exception in message handler:", exc_info=True)
             except KeyboardInterrupt:
                 # Ctrl-c shouldn't crash the kernel here.
-                self.log.error("KeyboardInterrupt caught in kernel.")	
+                self.log.error("KeyboardInterrupt caught in kernel.")
             finally:
                 try:
                     self.post_handler_hook()
@@ -925,8 +925,10 @@ def _send_abort_reply(self, stream, msg, idents):
         self.log.info("%s", msg)
         reply_type = msg["header"]["msg_type"].rsplit("_", 1)[0] + "_reply"
         status = {"status": "aborted"}
-        md = {"engine": self.ident}
+        md = self.init_metadata(msg)
+        md = self.finish_metadata(msg, md, status)
         md.update(status)
+
         self.session.send(
             stream, reply_type, metadata=md,
             content=status, parent=msg, ident=idents,