fix: remove redundant trailing newlines in test files for consistency

Author: allnes

modules/util/tests/util_demangle_edge_cases.cpp

@@ -153,4 +153,3 @@ TEST(GetNamespaceEdgeCases, GetNamespace_WithMemberFunctionPointer_HandlesCorrec
   // Member function pointers have complex mangling
   EXPECT_TRUE(k_ns.empty() || !k_ns.empty());
 }
-

modules/util/tests/util_force_demangle_failure.cpp

@@ -86,4 +86,3 @@ TEST(DemangleFailureTest, GetNamespace_WithExtremelyLongTypeName_HandlesCorrectl
 #ifndef __GNUC__
 TEST(DemangleFailureTest, SkippedOnNonGCC) { EXPECT_TRUE(true); }
 #endif
-

modules/util/tests/util_msvc_mock.cpp

@@ -136,4 +136,4 @@ TEST(MSVCMockTest, NamespaceExtraction_NoNamespace) {
 
 #endif  // !_MSC_VER
 
-}  // namespace test_msvc_mock
+}  // namespace test_msvc_mock