format

Author: briwylde08

docs/build/guides/auth/contract-authorization.mdx

@@ -335,7 +335,7 @@ By using `env.current_contract_address()`, we can get the invoker's address and
 
 Custom account contracts are contracts that implement a special reserved function for validating externally provided signatures within the respective authorization context. The custom account contracts are essentially regular contracts, with an added capability to verify externally provided authorization.
 
-### `\_\_check_auth()`
+### `__check_auth()`
 
 A contract that implements the `CustomAccountInterface` for authorizing calls becomes a custom account contract. The interface contains a single function called `__check_auth()`. The function is a reserved function, and it is invoked automatically by the Host when a contract authorizes a transaction. It cannot be called manually.