Added fix for display hook call output format

IPython/core/displayhook.py

@@ -317,4 +317,4 b' class CapturingDisplayHook(object):'
         if result is None:
             return
         format_dict, md_dict = self.shell.display_formatter.format(result)
-        self.outputs.append((format_dict, md_dict))
+        self.outputs.append({ 'data': format_dict, 'metadata': md_dict })

IPython/core/tests/test_displayhook.py

@@ -101,3 +101,11 b' def test_interactivehooks_ast_modes_semi_supress():'
 
     finally:
         ip.ast_node_interactivity = saved_mode
+
+def test_capture_display_hook_format():
+    """Tests that the capture display hook conforms to the CapturedIO output format"""
+    hook = CapturingDisplayHook(ip)
+    hook({"foo": "bar"})
+    captured = CapturedIO(sys.stdout, sys.stderr, hook.outputs)
+    # Should not raise with RichOutput transformation error
+    captured.outputs