Polish "Add auto-configuration for Spring Data Envers"

See gh-22610

spring-boot-project/spring-boot-docs/src/docs/asciidoc/attributes.adoc

@@ -60,6 +60,8 @@
 :spring-data-couchbase-docs: https://docs.spring.io/spring-data/couchbase/docs/{spring-data-couchbase-version}/reference/html/
 :spring-data-elasticsearch: https://spring.io/projects/spring-data-elasticsearch
 :spring-data-elasticsearch-docs: https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/
+:spring-data-envers: https://spring.io/projects/spring-data-envers
+:spring-data-envers-doc: https://docs.spring.io/spring-data/envers/docs/{spring-data-envers-version}/reference/html/
 :spring-data-gemfire: https://spring.io/projects/spring-data-gemfire
 :spring-data-geode: https://spring.io/projects/spring-data-geode
 :spring-data-jpa: https://spring.io/projects/spring-data-jpa

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/sql.adoc

@@ -247,6 +247,21 @@ For complete details, see the {spring-data-jpa-docs}[Spring Data JPA reference d
 
 
 
+[[features.sql.jpa-and-spring-data.envers-repositories]]
+==== Spring Data Envers Repositories
+If {spring-data-envers}[Spring Data Envers] is available, JPA repositories are auto-configured to support typical Envers queries.
+
+To use Spring Data Envers, make sure your repository extends from `RevisionRepository` as show in the following example:
+
+[source,java,indent=0,subs="verbatim"]
+----
+include::{docs-java}/features/sql/jpaandspringdata/repositories/CountryRepository.java[]
+----
+
+NOTE: For more details, check the {spring-data-envers-doc}[Spring Data Envers reference documentation].
+
+
+
 [[features.sql.jpa-and-spring-data.creating-and-dropping]]
 ==== Creating and Dropping JPA Databases
 By default, JPA databases are automatically created *only* if you use an embedded database (H2, HSQL, or Derby).

spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/features/sql/jpaandspringdata/entityclasses/Country.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2012-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.features.sql.jpaandspringdata.entityclasses;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+import org.hibernate.envers.Audited;
+
+@Entity
+public class Country implements Serializable {
+
+	@Id
+	@GeneratedValue
+	private Long id;
+
+	@Audited
+	@Column(nullable = false)
+	private String name;
+
+	public Long getId() {
+		return this.id;
+	}
+
+	public void setId(Long id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return this.name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}

spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/features/sql/jpaandspringdata/repositories/CountryRepository.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2012-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.features.sql.jpaandspringdata.repositories;
+
+import org.springframework.boot.docs.features.sql.jpaandspringdata.entityclasses.Country;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.repository.Repository;
+import org.springframework.data.repository.history.RevisionRepository;
+
+public interface CountryRepository extends RevisionRepository<Country, Long, Integer>, Repository<Country, Long> {
+
+	Page<Country> findAll(Pageable pageable);
+
+}