Change _mlua to __mlua prefix for internal chunk names

src/function.rs

@@ -285,7 +285,7 @@ impl<'lua> Function<'lua> {
             "#,
         )
         .try_cache()
-        .set_name("_mlua_bind")
+        .set_name("__mlua_bind")
         .call((self.clone(), args_wrapper))
     }
 

src/lua.rs

@@ -2887,7 +2887,7 @@ impl Lua {
             "#,
         )
         .try_cache()
-        .set_name("_mlua_async_poll")
+        .set_name("__mlua_async_poll")
         .set_environment(env)
         .into_function()
     }