test: fix default initializer

Author: JohelEGP

regression-tests/pure2-hashable.cpp2

@@ -3,7 +3,7 @@ base: @struct @hashable type = {
 }
 
 mystruct: @struct @hashable type = {
-    this: base = (1);
+    this: base = 1;
     i: i32;
     j: std::string;
     k: u64;
@@ -12,4 +12,4 @@ mystruct: @struct @hashable type = {
 main: () = {
     x: mystruct = (2, "three", 4u);
     std::cout << x.hash();
-}
+}

regression-tests/test-results/pure2-hashable.cpp

@@ -66,7 +66,7 @@ return ret;
 
 mystruct::mystruct(auto&& i_, auto&& j_, auto&& k_)
 requires (std::is_convertible_v<CPP2_TYPEOF(i_), std::add_const_t<cpp2::i32>&> && std::is_convertible_v<CPP2_TYPEOF(j_), std::add_const_t<std::string>&> && std::is_convertible_v<CPP2_TYPEOF(k_), std::add_const_t<cpp2::u64>&>) 
-                                                                                                       : base{ { 1 } }
+                                                                                                       : base{ 1 }
                                                                                                        , i{ CPP2_FORWARD(i_) }
                                                                                                        , j{ CPP2_FORWARD(j_) }
                                                                                                        , k{ CPP2_FORWARD(k_) }{}