Add whitespace after copyright header

Add an additional lines after the copyright header and before the
`package` declaration. This aligns with the style used by Spring
Framework.

Issue gh-8945

cas/src/main/java/org/springframework/security/cas/SamlServiceProperties.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas;
 
 /**

cas/src/main/java/org/springframework/security/cas/authentication/CasAssertionAuthenticationToken.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.authentication;
 
 import java.util.ArrayList;

cas/src/main/java/org/springframework/security/cas/authentication/NullStatelessTicketCache.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.authentication;
 
 /**

cas/src/main/java/org/springframework/security/cas/authentication/SpringCacheBasedTicketCache.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.authentication;
 
 import org.apache.commons.logging.Log;

cas/src/main/java/org/springframework/security/cas/authentication/package-info.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 /**
  * An {@code AuthenticationProvider} that can process CAS service tickets and proxy
  * tickets.

cas/src/main/java/org/springframework/security/cas/package-info.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 /**
  * Spring Security support for Jasig's Central Authentication Service
  * (<a href="https://www.jasig.org/cas">CAS</a>).

cas/src/main/java/org/springframework/security/cas/userdetails/AbstractCasAssertionUserDetailsService.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.userdetails;
 
 import org.jasig.cas.client.validation.Assertion;

cas/src/main/java/org/springframework/security/cas/userdetails/GrantedAuthorityFromAssertionAttributesUserDetailsService.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.userdetails;
 
 import java.util.ArrayList;

cas/src/main/java/org/springframework/security/cas/web/authentication/DefaultServiceAuthenticationDetails.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.web.authentication;
 
 import java.net.MalformedURLException;

cas/src/main/java/org/springframework/security/cas/web/authentication/ServiceAuthenticationDetails.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.web.authentication;
 
 import java.io.Serializable;

cas/src/main/java/org/springframework/security/cas/web/authentication/ServiceAuthenticationDetailsSource.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.web.authentication;
 
 import java.net.MalformedURLException;

cas/src/main/java/org/springframework/security/cas/web/authentication/package-info.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 /**
  * Authentication processing mechanisms which respond to the submission of authentication
  * credentials using CAS.

cas/src/main/java/org/springframework/security/cas/web/package-info.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 /**
  * Authenticates standard web browser users via CAS.
  */

cas/src/test/java/org/springframework/security/cas/authentication/AbstractStatelessTicketCacheTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.authentication;
 
 import java.util.ArrayList;

cas/src/test/java/org/springframework/security/cas/authentication/NullStatelessTicketCacheTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.authentication;
 
 import org.junit.Test;

cas/src/test/java/org/springframework/security/cas/userdetails/GrantedAuthorityFromAssertionAttributesUserDetailsServiceTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.userdetails;
 
 import java.util.Arrays;

cas/src/test/java/org/springframework/security/cas/web/authentication/DefaultServiceAuthenticationDetailsTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.cas.web.authentication;
 
 import java.util.regex.Pattern;