Update qiskit/primitives/primitive_job.py

Co-authored-by: Takashi Imamichi <31178928+t-imamichi@users.noreply.github.com>

qiskit/primitives/primitive_job.py

@@ -48,7 +48,8 @@ def _submit(self):
         self._future = executor.submit(self._function, *self._args, **self._kwargs)
         executor.shutdown(wait=False)
 
-    def _prepare_dump(self):  # This method allows PrimitiveJob to be serialized
+    def _prepare_dump(self):
+    """This method allows PrimitiveJob to be serialized"""
         _ = self.result()
         _ = self.status()
         self._future = None