fixed binary dump format

Author: daniel-sanche

gapic/templates/%namespace/%name_%version/%sub/services/%service/_shared_macros.j2

@@ -276,7 +276,7 @@ def _get_http_options():
             elif isinstance(request, google.protobuf.message.Message):
                 request_payload = MessageToJson(request)
             else:
-                request_payload = f"{type(request).__name__}: {pickle.dumps(request)}"
+                request_payload = f"{type(request).__name__}: {pickle.dumps(request)!r}"
 
             request_metadata = {
                 key: value.decode("utf-8") if isinstance(value, bytes) else value

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/grpc.py.j2

@@ -76,7 +76,7 @@ class _LoggingClientInterceptor(grpc.UnaryUnaryClientInterceptor):  # pragma: NO
             elif isinstance(result, google.protobuf.message.Message):
                 response_payload = MessageToJson(result)
             else:
-                response_payload = f"{type(result).__name__}: {pickle.dumps(result)}"
+                response_payload = f"{type(result).__name__}: {pickle.dumps(result)!r}"
             grpc_response = {
                 "payload": response_payload,
                 "metadata": metadata,

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/grpc_asyncio.py.j2

@@ -81,7 +81,7 @@ class _LoggingClientAIOInterceptor(grpc.aio.UnaryUnaryClientInterceptor):  # pra
             elif isinstance(result, google.protobuf.message.Message):
                 response_payload = MessageToJson(result)
             else:
-                response_payload = f"{type(result).__name__}: {pickle.dumps(result)}"
+                response_payload = f"{type(result).__name__}: {pickle.dumps(result)!r}"
             grpc_response = {
                 "payload": response_payload,
                 "metadata": metadata,