fix: cargo clippy --all --fix

Author: chadoh

contracts/test/registry-stub/src/lib.rs

@@ -13,21 +13,21 @@ pub struct RegistryStub;
 
 #[contractimpl]
 impl RegistryStub {
-    pub fn __constructor(env: Env, manager: Address) {
+    pub fn __constructor(env: &Env, manager: &Address) {
         env.storage().instance().set(&Key::Manager, &manager);
     }
 
     /// Mirrors the real registry's manager-only entry points: requires the
     /// stored manager's auth and records the value so tests can assert the
     /// call went through.
-    pub fn manager_only(env: Env, value: u32) -> u32 {
+    pub fn manager_only(env: &Env, value: u32) -> u32 {
         let manager: Address = env.storage().instance().get(&Key::Manager).unwrap();
         manager.require_auth();
         env.storage().instance().set(&Key::Recorded, &value);
         value
     }
 
-    pub fn recorded(env: Env) -> Option<u32> {
+    pub fn recorded(env: &Env) -> Option<u32> {
         env.storage().instance().get(&Key::Recorded)
     }
 }