Fix formatting issues, refactor the `profiles` word in the properties.

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/error/KebabCasingDemoApplication.java

@@ -5,8 +5,8 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
 public class KebabCasingDemoApplication {
-	public static void main(String[] args) {
-		SpringApplication.run(KebabCasingDemoApplication.class, args);
-	}
-	
+    public static void main(String[] args) {
+        SpringApplication.run(KebabCasingDemoApplication.class, args);
+    }
+
 }

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/error/configuration/MainConfiguration.java

@@ -4,15 +4,15 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.context.annotation.Configuration;
 
 @Configuration
-@ConfigurationProperties(prefix = "profile.profileProperties")
+@ConfigurationProperties(prefix = "customProperties")
 public class MainConfiguration {
-	private String name;
-	
-	public String getName() {
-		return name;
-	}
-	
-	public void setName(final String name) {
-		this.name = name;
-	}
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
 }

spring-boot-modules/spring-boot-properties-3/src/main/resources/application.properties

@@ -34,10 +34,10 @@ not.existing.system.property=${thispropertydoesnotexist}
 baeldung.presentation=${HELLO_BAELDUNG}. Java is installed in the folder: ${JAVA_HOME}
 #---
 #camelCasing
-#profile.applicationProperties.name="Baeldung"
+#customProperties.name="Baeldung"
 #PascalCasing
-#profile.ApplicationProperties.name="Baeldung"
+#CustomProperties.name="Baeldung"
 #SnakingCasing
-#profile.application_properties.name="Baeldung"
+#custom_properties.name="Baeldung"
 #KebabCasing
-profile.application-properties.name="Baeldung"
+custom-properties.name="Baeldung"