fix: state error unavailable contract address format

.gitignore

@@ -9,3 +9,4 @@ target
 
 tmp_venv/*
 
+.spr.yml

crates/blockifier/src/state/error_format_test.rs

@@ -1,4 +1,4 @@
-use starknet_api::core::ClassHash;
+use starknet_api::core::{ClassHash, ContractAddress};
 use starknet_types_core::felt::Felt;
 
 use crate::state::errors::StateError;
@@ -12,3 +12,13 @@ fn test_error_undeclared_class_hash_format() {
          not declared."
     );
 }
+
+#[test]
+fn test_error_unavailable_contract_address_format() {
+    let error = StateError::UnavailableContractAddress(ContractAddress::from(10_u128));
+    assert_eq!(
+        error.to_string(),
+        "Requested 0x000000000000000000000000000000000000000000000000000000000000000a is \
+         unavailable for deployment."
+    );
+}

crates/blockifier/src/state/errors.rs

@@ -19,7 +19,7 @@ pub enum StateError {
     OutOfRangeContractAddress,
     #[error(transparent)]
     ProgramError(#[from] ProgramError),
-    #[error("Requested {0:?} is unavailable for deployment.")]
+    #[error("Requested {:#064x} is unavailable for deployment.",***.0)]
     UnavailableContractAddress(ContractAddress),
     #[error("Class with hash {:#064x} is not declared.", **.0)]
     UndeclaredClassHash(ClassHash),