docs: Specify limit for properties in Index message in Datastore Admin API (#1149)

* docs: Specify limit for `properties` in `Index` message in Datastore Admin API
docs: Minor formatting in Datastore Admin API

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google-cloud-datastore/src/main/java/com/google/cloud/datastore/admin/v1/DatastoreAdminClient.java

@@ -58,56 +58,40 @@
  *
  * <p>The Datastore Admin API provides several admin services for Cloud Datastore.
  *
- * <p>----------------------------------------------------------------------------- ## Concepts
- *
- * <p>Project, namespace, kind, and entity as defined in the Google Cloud Datastore API.
+ * <p>Concepts: Project, namespace, kind, and entity as defined in the Google Cloud Datastore API.
  *
  * <p>Operation: An Operation represents work being performed in the background.
  *
  * <p>EntityFilter: Allows specifying a subset of entities in a project. This is specified as a
  * combination of kinds and namespaces (either or both of which may be all).
  *
- * <p>----------------------------------------------------------------------------- ## Services
- *
- * <p># Export/Import
- *
- * <p>The Export/Import service provides the ability to copy all or a subset of entities to/from
- * Google Cloud Storage.
- *
- * <p>Exported data may be imported into Cloud Datastore for any Google Cloud Platform project. It
- * is not restricted to the export source project. It is possible to export from one project and
- * then import into another.
- *
- * <p>Exported data can also be loaded into Google BigQuery for analysis.
+ * <p>Export/Import Service:
  *
- * <p>Exports and imports are performed asynchronously. An Operation resource is created for each
- * export/import. The state (including any errors encountered) of the export/import may be queried
- * via the Operation resource.
+ * <p>- The Export/Import service provides the ability to copy all or a subset of entities to/from
+ * Google Cloud Storage. - Exported data may be imported into Cloud Datastore for any Google Cloud
+ * Platform project. It is not restricted to the export source project. It is possible to export
+ * from one project and then import into another. - Exported data can also be loaded into Google
+ * BigQuery for analysis. - Exports and imports are performed asynchronously. An Operation resource
+ * is created for each export/import. The state (including any errors encountered) of the
+ * export/import may be queried via the Operation resource.
  *
- * <p># Index
+ * <p>Index Service:
  *
- * <p>The index service manages Cloud Datastore composite indexes.
+ * <p>- The index service manages Cloud Datastore composite indexes. - Index creation and deletion
+ * are performed asynchronously. An Operation resource is created for each such asynchronous
+ * operation. The state of the operation (including any errors encountered) may be queried via the
+ * Operation resource.
  *
- * <p>Index creation and deletion are performed asynchronously. An Operation resource is created for
- * each such asynchronous operation. The state of the operation (including any errors encountered)
- * may be queried via the Operation resource.
+ * <p>Operation Service:
  *
- * <p># Operation
- *
- * <p>The Operations collection provides a record of actions performed for the specified project
+ * <p>- The Operations collection provides a record of actions performed for the specified project
  * (including any operations in progress). Operations are not created directly but through calls on
- * other collections or resources.
- *
- * <p>An operation that is not yet done may be cancelled. The request to cancel is asynchronous and
- * the operation may continue to run for some time after the request to cancel is made.
- *
- * <p>An operation that is done may be deleted so that it is no longer listed as part of the
- * Operation collection.
- *
- * <p>ListOperations returns all pending operations, but not completed operations.
- *
- * <p>Operations are created by service DatastoreAdmin, but are accessed via service
- * google.longrunning.Operations.
+ * other collections or resources. - An operation that is not yet done may be cancelled. The request
+ * to cancel is asynchronous and the operation may continue to run for some time after the request
+ * to cancel is made. - An operation that is done may be deleted so that it is no longer listed as
+ * part of the Operation collection. - ListOperations returns all pending operations, but not
+ * completed operations. - Operations are created by service DatastoreAdmin, but are accessed via
+ * service google.longrunning.Operations.
  *
  * <p>This class provides the ability to make remote calls to the backing service through method
  * calls that map to API methods. Sample code to get started:

google-cloud-datastore/src/main/java/com/google/cloud/datastore/admin/v1/package-info.java

@@ -25,56 +25,40 @@
  *
  * <p>The Datastore Admin API provides several admin services for Cloud Datastore.
  *
- * <p>----------------------------------------------------------------------------- ## Concepts
- *
- * <p>Project, namespace, kind, and entity as defined in the Google Cloud Datastore API.
+ * <p>Concepts: Project, namespace, kind, and entity as defined in the Google Cloud Datastore API.
  *
  * <p>Operation: An Operation represents work being performed in the background.
  *
  * <p>EntityFilter: Allows specifying a subset of entities in a project. This is specified as a
  * combination of kinds and namespaces (either or both of which may be all).
  *
- * <p>----------------------------------------------------------------------------- ## Services
- *
- * <p># Export/Import
- *
- * <p>The Export/Import service provides the ability to copy all or a subset of entities to/from
- * Google Cloud Storage.
- *
- * <p>Exported data may be imported into Cloud Datastore for any Google Cloud Platform project. It
- * is not restricted to the export source project. It is possible to export from one project and
- * then import into another.
- *
- * <p>Exported data can also be loaded into Google BigQuery for analysis.
+ * <p>Export/Import Service:
  *
- * <p>Exports and imports are performed asynchronously. An Operation resource is created for each
- * export/import. The state (including any errors encountered) of the export/import may be queried
- * via the Operation resource.
+ * <p>- The Export/Import service provides the ability to copy all or a subset of entities to/from
+ * Google Cloud Storage. - Exported data may be imported into Cloud Datastore for any Google Cloud
+ * Platform project. It is not restricted to the export source project. It is possible to export
+ * from one project and then import into another. - Exported data can also be loaded into Google
+ * BigQuery for analysis. - Exports and imports are performed asynchronously. An Operation resource
+ * is created for each export/import. The state (including any errors encountered) of the
+ * export/import may be queried via the Operation resource.
  *
- * <p># Index
+ * <p>Index Service:
  *
- * <p>The index service manages Cloud Datastore composite indexes.
+ * <p>- The index service manages Cloud Datastore composite indexes. - Index creation and deletion
+ * are performed asynchronously. An Operation resource is created for each such asynchronous
+ * operation. The state of the operation (including any errors encountered) may be queried via the
+ * Operation resource.
  *
- * <p>Index creation and deletion are performed asynchronously. An Operation resource is created for
- * each such asynchronous operation. The state of the operation (including any errors encountered)
- * may be queried via the Operation resource.
+ * <p>Operation Service:
  *
- * <p># Operation
- *
- * <p>The Operations collection provides a record of actions performed for the specified project
+ * <p>- The Operations collection provides a record of actions performed for the specified project
  * (including any operations in progress). Operations are not created directly but through calls on
- * other collections or resources.
- *
- * <p>An operation that is not yet done may be cancelled. The request to cancel is asynchronous and
- * the operation may continue to run for some time after the request to cancel is made.
- *
- * <p>An operation that is done may be deleted so that it is no longer listed as part of the
- * Operation collection.
- *
- * <p>ListOperations returns all pending operations, but not completed operations.
- *
- * <p>Operations are created by service DatastoreAdmin, but are accessed via service
- * google.longrunning.Operations.
+ * other collections or resources. - An operation that is not yet done may be cancelled. The request
+ * to cancel is asynchronous and the operation may continue to run for some time after the request
+ * to cancel is made. - An operation that is done may be deleted so that it is no longer listed as
+ * part of the Operation collection. - ListOperations returns all pending operations, but not
+ * completed operations. - Operations are created by service DatastoreAdmin, but are accessed via
+ * service google.longrunning.Operations.
  *
  * <p>Sample for DatastoreAdminClient:
  *