Handle hot module unloading in layout

src/app/util/history.ts

@@ -2,10 +2,9 @@ import {page} from "$app/stores"
 
 export const lastPageBySpaceUrl = new Map<string, string>()
 
-export const setupHistory = () => {
+export const setupHistory = () =>
   page.subscribe($page => {
     if ($page.params.relay) {
       lastPageBySpaceUrl.set($page.params.relay, $page.url.pathname)
     }
   })
-}