updated docstrings

Author: daniel-sanche

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

@@ -103,7 +103,7 @@ class {{ service.name }}Transport(abc.ABC):
                 your own client library.
             always_use_jwt_access (Optional[bool]): Whether self signed JWT should
                 be used for service account credentials.
-            api_audience Optional[str]: The intended audience for the API calls
+            api_audience (Optional[str]): The intended audience for the API calls
                 to the service that will be set when using certain 3rd party
                 authentication flows. Audience is typically a resource identifier.
                 If not set, the host value will be used as a default.

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

@@ -169,7 +169,7 @@ class {{ service.name }}GrpcTransport({{ service.name }}Transport):
                 your own client library.
             always_use_jwt_access (Optional[bool]): Whether self signed JWT should
                 be used for service account credentials.
-            api_audience Optional[str]: The intended audience for the API calls
+            api_audience (Optional[str]): The intended audience for the API calls
                 to the service that will be set when using certain 3rd party
                 authentication flows. Audience is typically a resource identifier.
                 If not set, the host value will be used as a default.

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

@@ -218,7 +218,7 @@ class {{ service.grpc_asyncio_transport_name }}({{ service.name }}Transport):
                 your own client library.
             always_use_jwt_access (Optional[bool]): Whether self signed JWT should
                 be used for service account credentials.
-            api_audience Optional[str]: The intended audience for the API calls
+            api_audience (Optional[str]): The intended audience for the API calls
                 to the service that will be set when using certain 3rd party
                 authentication flows. Audience is typically a resource identifier.
                 If not set, the host value will be used as a default.

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

@@ -135,9 +135,9 @@ class {{service.name}}RestTransport(_Base{{ service.name }}RestTransport):
             url_scheme: the protocol scheme for the API endpoint.  Normally
                 "https", but for testing or local servers,
                 "http" can be specified.
-            interceptor Optional[{{ service.name }}RestInterceptor]:  Interceptor used
+            interceptor (Optional[{{ service.name }}RestInterceptor]): Interceptor used
                 to manipulate requests, request metadata, and responses.
-            api_audience Optional[str]: The intended audience for the API calls
+            api_audience (Optional[str]): The intended audience for the API calls
                 to the service that will be set when using certain 3rd party
                 authentication flows. Audience is typically a resource identifier.
                 If not set, the host value will be used as a default.

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

@@ -134,7 +134,7 @@ class Async{{service.name}}RestTransport(_Base{{ service.name }}RestTransport):
             url_scheme (str): the protocol scheme for the API endpoint.  Normally
                 "https", but for testing or local servers,
                 "http" can be specified.
-            interceptor Optional[{{ service.name }}RestInterceptor]:  Interceptor used
+            interceptor (Optional[Async{{ service.name }}RestInterceptor]): Interceptor used
                 to manipulate requests, request metadata, and responses.
         """
         # Run the base constructor