Fix typos

Closes gh-11460

README.adoc

@@ -206,7 +206,7 @@ Spring Boot Actuator provides additional auto-configuration to decorate your app
 with features that make it instantly deployable and supportable in production. For
 instance, if you are writing a JSON web service then it will provide a server, security,
 logging, externalized configuration, management endpoints, an audit abstraction, and
-more. If you want to switch off the built in features, or extend or replace them, it
+more. If you want to switch off the built-in features, or extend or replace them, it
 makes that really easy as well.
 
 

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/junit/GradleCompatibilitySuite.java

@@ -30,7 +30,7 @@ import org.junit.runners.model.InitializationError;
 import org.springframework.boot.gradle.testkit.GradleBuild;
 
 /**
- * Custom {@link Suite} that runs tests against multiple version of Gradle. Test classes
+ * Custom {@link Suite} that runs tests against multiple versions of Gradle. Test classes
  * using the suite must have a public {@link GradleBuild} field named {@code gradleBuild}
  * and annotated with {@link Rule}.
  *