Address review feedback: remove trailing whitespace and use assertThatCode pattern

Co-authored-by: nixel2007 <[email protected]>

Author: Copilot

src/test/java/com/github/_1c_syntax/bsl/languageserver/diagnostics/DeletingCollectionItemDiagnosticTest.java

@@ -28,6 +28,7 @@
 import java.util.List;
 
 import static com.github._1c_syntax.bsl.languageserver.util.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
 
 
 class DeletingCollectionItemDiagnosticTest extends AbstractDiagnosticTest<DeletingCollectionItemDiagnostic> {
@@ -56,15 +57,14 @@ void testIncompleteForEachStatement() {
     // Test that incomplete forEach statement doesn't cause NullPointerException
     String module = """
       Процедура Тест()
-        Для Каждого\s
+        Для Каждого
       КонецПроцедуры
       """;
 
     var documentContext = TestUtils.getDocumentContext(module);
-    var diagnostics = getDiagnostics(documentContext);
 
-    // Should not throw NullPointerException and should have no diagnostics
-    assertThat(diagnostics).hasSize(0);
+    assertThatCode(() -> getDiagnostics(documentContext))
+      .doesNotThrowAnyException();
   }
 
 }