Fix doc

bridges/snowbridge/pallets/system/src/lib.rs

@@ -28,7 +28,7 @@
 //!
 //! Only Polkadot governance itself can call these extrinsics. Delivery fees are waived.
 //!
-//! * [`Call::upgrade`]`: Upgrade the gateway contract
+//! * [`Call::upgrade`]: Upgrade the gateway contract
 //! * [`Call::set_operating_mode`]: Update the operating mode of the gateway contract
 //! * [`Call::force_update_channel`]: Allow root to update a channel for a sibling
 //! * [`Call::force_transfer_native_from_agent`]: Allow root to withdraw ether from an agent
@@ -42,6 +42,7 @@
 //! prerequisite, the token should be registered first.
 //!
 //! * [`Call:register_token`]: Register a token location as a wrapped ERC20 contract on Ethereum.
+//! 
 #![cfg_attr(not(feature = "std"), no_std)]
 #[cfg(test)]
 mod mock;