add test

test/runtime/samples/each-block-string/_config.js

@@ -0,0 +1,10 @@
+export default {
+	compileOptions: {
+		dev: true
+	},
+	html: `
+		<div>f</div>
+		<div>o</div>
+		<div>o</div>
+	`
+};

test/runtime/samples/each-block-string/main.svelte

@@ -0,0 +1,3 @@
+{#each 'foo' as c}
+	<div>{c}</div>
+{/each}