chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/repl/src/repl_store.rs

@@ -129,7 +129,7 @@ impl ReplStore {
                     // Top priority is the selected kernel
                     return runtime_specification.name.to_lowercase() == selected.to_lowercase();
                 }
-                return false;
+                false
             })
             .cloned();