chore: Apply a couple fixes I missed in previous commits

Author: jbencin

stackslib/src/chainstate/stacks/boot/pox_2_tests.rs

@@ -283,8 +283,8 @@ pub fn check_pox_print_event(
                     if v != &inner_val {
                         wrong.push((
                             (&inner_key).to_string(),
-                            format!("{}", v),
-                            format!("{}", &inner_val),
+                            v.to_string(),
+                            (&inner_val).to_string(),
                         ));
                     }
                 }

stackslib/src/net/api/getattachmentsinv.rs

@@ -172,7 +172,7 @@ impl RPCRequestHandler for RPCGetAttachmentsInvRequestHandler {
         }
         if page_indexes.is_empty() {
             let msg = "Page indexes missing".to_string();
-            warn!("{}", msg);
+            warn!("{msg}");
             return StacksHttpResponse::new_error(&preamble, &HttpBadRequest::new(msg))
                 .try_into_contents()
                 .map_err(NetError::from);