Merge pull request #2997 from Riggs333/patch-1

* patch-1:
  Fix typo in javadoc

spring-boot/src/main/java/org/springframework/boot/context/event/ApplicationReadyEvent.java

@@ -22,7 +22,7 @@ import org.springframework.context.ConfigurableApplicationContext;
 /**
  * Event published as late as conceivably possible to indicate that the application is
  * ready to service requests. The source of the event is the {@link SpringApplication}
- * itself, but beware of modifying its internal state since since all initialization steps
+ * itself, but beware of modifying its internal state since all initialization steps
  * will have been completed by then.
  *
  * @author Stephane Nicoll