Fix edit magic payload type (#1171)

Author: blink1073

ipykernel/zmqshell.py

@@ -302,7 +302,7 @@ def edit(self, parameter_s="", last_call=None):
 
         # Make sure we send to the client an absolute path, in case the working
         # directory of client and kernel don't match
-        filename = Path(filename).resolve()
+        filename = str(Path(filename).resolve())
 
         payload = {"source": "edit_magic", "filename": filename, "line_number": lineno}
         assert self.shell is not None

tests/test_zmq_shell.py

@@ -220,6 +220,9 @@ def test_magics(tmp_path):
     tmp_file = tmp_path / "test.txt"
     tmp_file.write_text("hi", "utf8")
     magics.edit(str(tmp_file))
+    payload = shell.payload_manager.read_payload()[0]
+    assert payload["filename"] == str(tmp_file)
+
     magics.clear([])
     magics.less(str(tmp_file))
     if os.name == "posix":