Best I can do to simplify the check(fmt::format)crap is to make a little macro to do the format part.

src/gui/debug_ui.cpp

@@ -51,7 +51,7 @@ namespace gui {
       auto player_combat = level.world->get<components::Combat>(player.entity);
       auto map = level.map;
 
-      std::wstring stats = fmt::format(L"STATS\n"
+      std::wstring stats = $F(L"STATS\n"
           L"HP: {}\n"
           L"mean:{:>8.5}\n"
           L"sdev: {:>8.5}\n"