minor refactoring

Former-commit-id: 51737488ef757bbeb24a479dc616c6ef6b081b25

lib/fetch/content/content-fetch-resources.js

@@ -29,11 +29,11 @@ this.singlefile.lib.fetch.content.resources = this.singlefile.lib.fetch.content.
 	const FETCH_RESPONSE_EVENT = "single-file-response-fetch";
 
 	return {
-		fetch: async (url) => {
+		fetch: async url => {
 			try {
 				let response = await fetch(url, { cache: "force-cache" });
 				if (response.status == 403) {
-					response = await hostFetch(url);
+					response = hostFetch(url);
 				}
 				return response;
 			}
@@ -73,12 +73,12 @@ this.singlefile.lib.fetch.content.resources = this.singlefile.lib.fetch.content.
 							resolve({
 								status: event.detail.status,
 								headers: {
-									get: (name) => {
+									get: name => {
 										const header = event.detail.headers.find(header => header[0] == name);
 										return header && header[1];
 									}
 								},
-								arrayBuffer: () => new Promise(resolve => resolve(event.detail.response))
+								arrayBuffer: async () => event.detail.response
 							});
 						} else {
 							reject(event.detail.error);