replace nbsp in test

Author: Conduitry

packages/svelte/tests/runtime-legacy/samples/dynamic-element-store/main.svelte

@@ -1,6 +1,6 @@
 <script>
-  import { writable } from 'svelte/store';
-  const foo = writable('div');
+	import { writable } from 'svelte/store';
+	const foo = writable('div');
 </script>
 
-<svelte:element this={$foo}></svelte:element>
+<svelte:element this={$foo}></svelte:element>