Fix Spotless violations

Author: sbrannen

documentation/src/test/java/example/exception/ExceptionAssertionDemo.java

@@ -15,7 +15,6 @@
 
 import org.junit.jupiter.api.Test;
 
-
 class ExceptionAssertionDemo {
 
 	// @formatter:off

documentation/src/test/java/example/exception/ExceptionAssertionExactDemo.java

@@ -13,10 +13,10 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
 
-import org.junit.jupiter.api.Test;
-
 import extensions.ExpectToFail;
 
+import org.junit.jupiter.api.Test;
+
 public class ExceptionAssertionExactDemo {
 
 	@ExpectToFail

documentation/src/test/java/example/exception/FailedAssertionDemo.java

@@ -14,10 +14,10 @@
 
 import example.util.Calculator;
 
-import org.junit.jupiter.api.Test;
-
 import extensions.ExpectToFail;
 
+import org.junit.jupiter.api.Test;
+
 class FailedAssertionDemo {
 
 	// tag::user_guide[]

documentation/src/test/java/example/exception/UncaughtExceptionHandlingDemo.java

@@ -12,10 +12,10 @@
 
 import example.util.Calculator;
 
-import org.junit.jupiter.api.Test;
-
 import extensions.ExpectToFail;
 
+import org.junit.jupiter.api.Test;
+
 class UncaughtExceptionHandlingDemo {
 
 	// tag::user_guide[]