Fix formatting and exclude devtools extension from analyzer

- Format test/devtools_test.dart
- Exclude tool/get_it_devtools_extension/** from analyzer to avoid dependency errors

Author: escamoteur

analysis_options.yaml

@@ -1,7 +1,8 @@
 include: package:lint/analysis_options_package.yaml
 
-# analyzer:
-#   exclude:
+analyzer:
+  exclude:
+    - tool/get_it_devtools_extension/**
 
 formatter: 
   trailing_commas: preserve

test/devtools_test.dart

@@ -33,16 +33,16 @@ void main() {
 
       // Unregister
       GetIt.I.unregister<String>();
-      
+
       // Reset
       await GetIt.I.reset();
     });
-    
+
     test('Service extension logic runs without error', () async {
-       // We can't easily invoke the extension here without VM Service, 
-       // but we can ensure the registration code in the constructor didn't crash.
-       // The constructor is called when we access GetIt.instance for the first time.
-       expect(GetIt.I, isNotNull);
+      // We can't easily invoke the extension here without VM Service,
+      // but we can ensure the registration code in the constructor didn't crash.
+      // The constructor is called when we access GetIt.instance for the first time.
+      expect(GetIt.I, isNotNull);
     });
   });
 }