Polish

Closes gh-9938

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/BackgroundPreinitializer.java

@@ -46,14 +46,14 @@ import org.springframework.http.converter.support.AllEncompassingFormHttpMessage
 public class BackgroundPreinitializer
 		implements ApplicationListener<SpringApplicationEvent> {
 
-	private static final AtomicBoolean preinitalizationStarted = new AtomicBoolean(false);
+	private static final AtomicBoolean preinitializationStarted = new AtomicBoolean(false);
 
 	private static final CountDownLatch preinitializationComplete = new CountDownLatch(1);
 
 	@Override
 	public void onApplicationEvent(SpringApplicationEvent event) {
 		if (event instanceof ApplicationEnvironmentPreparedEvent) {
-			if (preinitalizationStarted.compareAndSet(false, true)) {
+			if (preinitializationStarted.compareAndSet(false, true)) {
 				performPreinitialization();
 			}
 		}

spring-boot-docs/src/main/asciidoc/deployment.adoc

@@ -451,7 +451,7 @@ then use the https://cloud.google.com/sdk/downloads[Google Cloud SDK] to push yo
 Spring Boot app into that slot from the command line or CI build.
 
 App Engine needs you to create an `app.yaml` file to describe the resources your app
-requires. Normally you put this in `src/min/appengine`, and it looks something like this:
+requires. Normally you put this in `src/main/appengine`, and it looks something like this:
 
 [source,yaml,indent=0]
 ----