fix: resolve google-java-format compatibility issue with Java 11

- Update build.gradle to use googleJavaFormat('1.7') for Java 11 compatibility
- Remove trailing whitespace in Util.java
- Auto-format DefaultJwtServiceTest.java to comply with google-java-format rules

The default google-java-format version had module access errors with Java 11.
Version 1.7 resolves these compatibility issues.

Co-Authored-By: Sam Fertig <sam.fertig@codeium.com>

Author: devin-ai-integration[bot]

build.gradle

@@ -16,7 +16,7 @@ spotless {
             include '**/*.java'
             exclude 'build/generated/**/*.*', 'build/generated-examples/**/*.*'
         }
-        googleJavaFormat()
+        googleJavaFormat('1.7')
     }
 }
 

src/main/java/io/spring/Util.java

@@ -4,7 +4,7 @@ public class Util {
   public static boolean isEmpty(String value) {
     return value == null || value.isEmpty();
   }
-  
+
   public static boolean isValidEmail(String email) {
     return email != null && email.contains("@");
   }

src/test/java/io/spring/infrastructure/service/DefaultJwtServiceTest.java

@@ -13,7 +13,8 @@ public class DefaultJwtServiceTest {
 
   @BeforeEach
   public void setUp() {
-    jwtService = new DefaultJwtService("123123123123123123123123123123123123123123123123123123123123", 3600);
+    jwtService =
+        new DefaultJwtService("123123123123123123123123123123123123123123123123123123123123", 3600);
   }
 
   @Test