quote props if necessary in SSR mode - fixes #3312

src/compiler/compile/render_ssr/handlers/InlineComponent.ts

@@ -58,7 +58,7 @@ export default function(node: InlineComponent, renderer: Renderer, options: Rend
 					if (attribute.is_spread) {
 						return snip(attribute.expression);
 					} else {
-						return `{ ${attribute.name}: ${get_attribute_value(attribute)} }`;
+						return `{ ${quote_name_if_necessary(attribute.name)}: ${get_attribute_value(attribute)} }`;
 					}
 				})
 				.concat(binding_props.map(p => `{ ${p} }`))
@@ -67,7 +67,7 @@ export default function(node: InlineComponent, renderer: Renderer, options: Rend
 	} else {
 		props = stringify_props(
 			node.attributes
-				.map(attribute => `${attribute.name}: ${get_attribute_value(attribute)}`)
+				.map(attribute => `${quote_name_if_necessary(attribute.name)}: ${get_attribute_value(attribute)}`)
 				.concat(binding_props)
 		);
 	}

test/runtime/samples/prop-quoted/Nested.svelte

@@ -0,0 +1 @@
+{$$props['x-y-z']}

test/runtime/samples/prop-quoted/_config.js

@@ -0,0 +1,12 @@
+export default {
+	props: {
+		foo: 1
+	},
+
+	html: `1`,
+
+	async test({ assert, component, target }) {
+		component.foo = 2;
+		assert.htmlEqual(target.innerHTML, `2`);
+	}
+};

test/runtime/samples/prop-quoted/main.svelte

@@ -0,0 +1,7 @@
+<script>
+	import Nested from './Nested.svelte';
+
+	export let foo;
+</script>
+
+<Nested x-y-z={foo}/>