chore: remove trailing whitespace (#816)

Author: busunkim96

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

@@ -51,7 +51,7 @@ class {{ service.name }}Transport(abc.ABC):
             scopes: typing.Optional[typing.Sequence[str]] = AUTH_SCOPES,
             quota_project_id: typing.Optional[str] = None,
             client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
-            **kwargs,       
+            **kwargs,
             ) -> None:
         """Instantiate the transport.
 
@@ -69,10 +69,10 @@ class {{ service.name }}Transport(abc.ABC):
             scope (Optional[Sequence[str]]): A list of scopes.
             quota_project_id (Optional[str]): An optional project to use for billing
                 and quota.
-            client_info (google.api_core.gapic_v1.client_info.ClientInfo):	
-                The client info used to send a user-agent string along with	
-                API requests. If ``None``, then default info will be used.	
-                Generally, you only need to set this if you're developing	
+            client_info (google.api_core.gapic_v1.client_info.ClientInfo):
+                The client info used to send a user-agent string along with
+                API requests. If ``None``, then default info will be used.
+                Generally, you only need to set this if you're developing
                 your own client library.
         """
         # Save the hostname. Default to port 443 (HTTPS) if none is specified.
@@ -87,7 +87,7 @@ class {{ service.name }}Transport(abc.ABC):
         # defaults.
         if credentials and credentials_file:
             raise exceptions.DuplicateCredentialArgs("'credentials_file' and 'credentials' are mutually exclusive")
-        
+
         if credentials_file is not None:
             credentials, _ = auth.load_credentials_from_file(
                                 credentials_file,
@@ -177,7 +177,7 @@ class {{ service.name }}Transport(abc.ABC):
         ],
     ]:
         raise NotImplementedError()
-    {% endif %} 
+    {% endif %}
 
 __all__ = (
     '{{ service.name }}Transport',

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

@@ -119,7 +119,7 @@ class {{ service.name }}GrpcTransport({{ service.name }}Transport):
             # If a channel was explicitly provided, set it.
             self._grpc_channel = channel
             self._ssl_channel_credentials = None
-        
+
         else:
             if api_mtls_endpoint:
                 host = api_mtls_endpoint
@@ -133,14 +133,14 @@ class {{ service.name }}GrpcTransport({{ service.name }}Transport):
                     )
                 else:
                     self._ssl_channel_credentials = SslCredentials().ssl_credentials
-            
+
             else:
                 if client_cert_source_for_mtls and not ssl_channel_credentials:
                     cert, key = client_cert_source_for_mtls()
                     self._ssl_channel_credentials = grpc.ssl_channel_credentials(
                         certificate_chain=cert, private_key=key
                     )
-        
+
         # The base transport sets the host, credentials and scopes
         super().__init__(
             host=host,

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

@@ -121,7 +121,7 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
                 If provided, it overrides the ``host`` argument and tries to create
                 a mutual TLS channel with client SSL credentials from
                 ``client_cert_source`` or applicatin default SSL credentials.
-            client_cert_source (Optional[Callable[[], Tuple[bytes, bytes]]]): 
+            client_cert_source (Optional[Callable[[], Tuple[bytes, bytes]]]):
                 Deprecated. A callback to provide client SSL certificate bytes and
                 private key bytes, both in PEM format. It is ignored if
                 ``api_mtls_endpoint`` is None.
@@ -133,10 +133,10 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
                 ignored if ``channel`` or ``ssl_channel_credentials`` is provided.
             quota_project_id (Optional[str]): An optional project to use for billing
                 and quota.
-            client_info (google.api_core.gapic_v1.client_info.ClientInfo):	
-                The client info used to send a user-agent string along with	
-                API requests. If ``None``, then default info will be used.	
-                Generally, you only need to set this if you're developing	
+            client_info (google.api_core.gapic_v1.client_info.ClientInfo):
+                The client info used to send a user-agent string along with
+                API requests. If ``None``, then default info will be used.
+                Generally, you only need to set this if you're developing
                 your own client library.
 
         Raises:
@@ -151,7 +151,7 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
         {%- if service.has_lro %}
         self._operations_client = None
         {%- endif %}
-    
+
         if api_mtls_endpoint:
             warnings.warn("api_mtls_endpoint is deprecated", DeprecationWarning)
         if client_cert_source:
@@ -177,7 +177,7 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
                     )
                 else:
                     self._ssl_channel_credentials = SslCredentials().ssl_credentials
-            
+
             else:
                 if client_cert_source_for_mtls and not ssl_channel_credentials:
                     cert, key = client_cert_source_for_mtls()
@@ -351,7 +351,7 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
                 response_deserializer=iam_policy.TestIamPermissionsResponse.FromString,
             )
         return self._stubs["test_iam_permissions"]
-    {% endif %} 
+    {% endif %}
 
 __all__ = (
     '{{ service.name }}GrpcAsyncIOTransport',

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

@@ -62,7 +62,7 @@ class {{ service.name }}RestTransport({{ service.name }}Transport):
                 credentials identify the application to the service; if none
                 are specified, the client will attempt to ascertain the
                 credentials from the environment.
-            
+
             credentials_file (Optional[str]): A file with credentials that can
                 be loaded with :func:`google.auth.load_credentials_from_file`.
                 This argument is ignored if ``channel`` is provided.
@@ -73,10 +73,10 @@ class {{ service.name }}RestTransport({{ service.name }}Transport):
                 if ``channel`` is provided.
             quota_project_id (Optional[str]): An optional project to use for billing
                 and quota.
-            client_info (google.api_core.gapic_v1.client_info.ClientInfo):	
-                The client info used to send a user-agent string along with	
-                API requests. If ``None``, then default info will be used.	
-                Generally, you only need to set this if you're developing	
+            client_info (google.api_core.gapic_v1.client_info.ClientInfo):
+                The client info used to send a user-agent string along with
+                API requests. If ``None``, then default info will be used.
+                Generally, you only need to set this if you're developing
                 your own client library.
         """
         # Run the base constructor
@@ -95,7 +95,7 @@ class {{ service.name }}RestTransport({{ service.name }}Transport):
         self._prep_wrapped_messages(client_info)
 
     {%- if service.has_lro %}
-    
+
     @property
     def operations_client(self) -> operations_v1.OperationsClient:
         """Create the client designed to process long-running operations.
@@ -147,7 +147,7 @@ class {{ service.name }}RestTransport({{ service.name }}Transport):
         {%- endif %}
         """
 
-        {# TODO(yon-mg): refactor when implementing grpc transcoding 
+        {# TODO(yon-mg): refactor when implementing grpc transcoding
                          - parse request pb & assign body, path params
                          - shove leftovers into query params
                          - make sure dotted nested fields preserved