fmt: repro_mail.rs, and the hand-taken zip snapshot ignored

`cargo fmt --all` wanted a `vec!` wrap and a trailing newline in repro_mail.rs, which
`main` has been carrying unformatted. The gate is `cargo fmt --all -- --check`, so it was
red before this and for nothing to do with the changes around it.

`benilla-octo.zip` is a zipped snapshot of this checkout, taken by hand to move the tree
somewhere. It is binary, redundant with the history it would land in, and 10 MB of it.

.gitignore

@@ -41,3 +41,7 @@ __pycache__/
 # The vanilla addon corpus the UI engine's real-addon tests read (third-party content): a symlink
 # beside `WoW`, or `BENILLA_ADDON_CORPUS`.
 /wow-addons-vanilla
+
+# A zipped snapshot of this checkout, taken by hand to move the tree somewhere. Binary, and
+# redundant with the history it would land in.
+/benilla-octo.zip

crates/benilla-app/tests/repro_mail.rs

@@ -116,7 +116,10 @@ fn repro() {
     let mut s = UiScript::new().unwrap();
     load_ui(&s);
     s.set_mail(Some(MailState {
-        inbox: vec![row(None, "Welcome", 0, 0), row(Some("Jaina"), "second", 0, 0)],
+        inbox: vec![
+            row(None, "Welcome", 0, 0),
+            row(Some("Jaina"), "second", 0, 0),
+        ],
     }));
     s.fire_event("MAIL_SHOW", vec![]);
     s.fire_event("MAIL_INBOX_UPDATE", vec![]);
@@ -131,4 +134,4 @@ fn repro() {
     let errs = s.take_errors();
     eprintln!("errors after empty re-list: {errs:#?}");
     assert!(true);
-}
+}