Improve line wrapping in the documentation

Author: gsmet

documentation/src/test/java/org/hibernate/validator/referenceguide/chapter06/constraintvalidatorpayload/ZipCodeValidator.java

@@ -21,7 +21,8 @@ public boolean isValid(String object, ConstraintValidatorContext constraintConte
 
 		boolean isValid = false;
 
-		String countryCode = constraintContext.unwrap( HibernateConstraintValidatorContext.class )
+		String countryCode = constraintContext
+				.unwrap( HibernateConstraintValidatorContext.class )
 				.getConstraintValidatorPayload( String.class );
 
 		if ( "US".equals( countryCode ) ) {