fixed backend test compilation

source/core/utils/library.cpp

@@ -9,13 +9,11 @@ library::library(std::string lib)
   : lib_(std::move(lib))
 {}
 
-library::~library()
-{
+library::~library() {
   unload();
 }
 
-bool library::load()
-{
+bool library::load() {
     auto path = os::getenv("MATADOR_BACKENDS_PATH");
 #if defined(_MSC_VER) || defined(__MINGW32__)
     auto cookie = AddDllDirectory(std::wstring(path.begin(), path.end()).c_str());