Revert "Fix error in cpp_tests/test_arrow.cpp."

This reverts commit e461e868.

tests/cpp_tests/test_arrow.cpp

@@ -148,18 +148,16 @@ class ArrowChunkedArrayTest : public testing::Test {
     arr.private_data = nullptr;
     return arr;
   }
-};
-
 
-/* ------------------------------------- SCHEMA CREATION ------------------------------------- */
+  /* ------------------------------------- SCHEMA CREATION ------------------------------------- */
 
-template <typename T>
-ArrowSchema create_primitive_schema() {
+  template <typename T>
+  ArrowSchema create_primitive_schema() {
     std::logic_error("not implemented");
-}
+  }
 
-template <>
-ArrowSchema create_primitive_schema<float>() {
+  template <>
+  ArrowSchema create_primitive_schema<float>() {
     ArrowSchema schema;
     schema.format = "f";
     schema.name = nullptr;
@@ -171,10 +169,10 @@ ArrowSchema create_primitive_schema<float>() {
     schema.release = nullptr;
     schema.private_data = nullptr;
     return schema;
-}
+  }
 
-template <>
-ArrowSchema create_primitive_schema<bool>() {
+  template <>
+  ArrowSchema create_primitive_schema<bool>() {
     ArrowSchema schema;
     schema.format = "b";
     schema.name = nullptr;
@@ -186,9 +184,9 @@ ArrowSchema create_primitive_schema<bool>() {
     schema.release = nullptr;
     schema.private_data = nullptr;
     return schema;
-}
+  }
 
-ArrowSchema create_nested_schema(const std::vector<ArrowSchema*>& arrays) {
+  ArrowSchema create_nested_schema(const std::vector<ArrowSchema*>& arrays) {
     auto children = static_cast<ArrowSchema**>(malloc(sizeof(ArrowSchema*) * arrays.size()));
     for (size_t i = 0; i < arrays.size(); ++i) {
       auto child = static_cast<ArrowSchema*>(malloc(sizeof(ArrowSchema)));
@@ -207,7 +205,8 @@ ArrowSchema create_nested_schema(const std::vector<ArrowSchema*>& arrays) {
     schema.release = &release_schema;
     schema.private_data = nullptr;
     return schema;
-}
+  }
+};
 
 /* --------------------------------------------------------------------------------------------- */
 /*                                             TESTS                                             */