Remove extra backtick in comments
@@ -779,7 +779,7 @@ pub trait SignedExtension: Codec + Debug + Sync + Send + Clone + Eq + PartialEq
/// Returns the list of unique identifier for this signed extension.
///
- /// As a [`SignedExtension`] can be a tuple of [`SignedExtension`]`s we need to return a `Vec`
+ /// As a [`SignedExtension`] can be a tuple of [`SignedExtension`]s we need to return a `Vec`
/// that holds all the unique identifiers. Each individual `SignedExtension` must return
/// *exactly* one identifier.
///
