Fixed cargo doc generation.

src/blockchain/hash_utils.rs

@@ -27,7 +27,7 @@ pub fn check_block_signature(block: &Block) -> bool {
 }
 
 /// Hashes some identity (domain in case of DNS). If you give it a public key, it will hash with it as well.
-/// Giving public key is needed to create a confirmation field in [Transaction]
+/// Giving public key is needed to create a confirmation field in [Transaction](crate::blockchain::Transaction)
 pub fn hash_identity(identity: &str, key: Option<&Bytes>) -> Bytes {
     let base = hash_sha256(identity.as_bytes());
     let identity = hash_sha256(&base);