Polish contribution

See gh-25875

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionMessage.java

 /*
- * Copyright 2012-2020 the original author or authors.
+ * 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.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfiguration.java

 /*
- * Copyright 2012-2020 the original author or authors.
+ * 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.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/embedded/DownloadConfigBuilderCustomizer.java

@@ -21,7 +21,7 @@ import de.flapdoodle.embed.process.config.store.IDownloadConfig;
 
 /**
  * Callback interface that can be implemented by beans wishing to customize the
- * {@link IDownloadConfig} via an {@link DownloadConfigBuilder} whilst retaining default
+ * {@link IDownloadConfig} via a {@link DownloadConfigBuilder} whilst retaining default
  * auto-configuration.
  *
  * @author Michael Gmeiner

spring-boot-project/spring-boot-docs/src/docs/asciidoc/production-ready-features.adoc

@@ -2343,7 +2343,7 @@ Each metric is tagged by the name of the Pool (can be controlled with `spring.da
 
 [[production-ready-metrics-hibernate]]
 ==== Hibernate Metrics
-Auto-configuration enables the instrumentation of all available Hibernate `EntityManagerFactory` instances that have statistics enabled are instrumented with a metric named `hibernate`.
+Auto-configuration enables the instrumentation of all available Hibernate `EntityManagerFactory` instances that have statistics enabled with a metric named `hibernate`.
 
 Metrics are also tagged by the name of the `EntityManagerFactory` that is derived from the bean name.
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/BootstrapRegistry.java

 /*
- * Copyright 2012-2020 the original author or authors.
+ * 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.