fix: lint

src/runtime/internal/dev.ts

@@ -158,7 +158,7 @@ export class SvelteComponentDev extends SvelteComponent {
 
 		if (!options.target && !current_component) {
 			throw new Error(
-				"Multiple Svelte instances detected. This can happen if you use Svelte components which are precompiled to JavaScript. " +
+				'Multiple Svelte instances detected. This can happen if you use Svelte components which are precompiled to JavaScript. ' +
 					"Ensure to use the raw Svelte version of these components, or set the 'target' option instead"
 			);
 		}