Add failing test for issue #4240

test/server-side-rendering/samples/spread-attributes-white-space/_expected.html

@@ -0,0 +1,3 @@
+<input value="
+    bar
+" />

test/server-side-rendering/samples/spread-attributes-white-space/main.svelte

@@ -0,0 +1,7 @@
+<script>
+	let props = {
+		value: '\n\tbar\n',
+	};
+</script>
+
+<input {...props} />