Yet more debug logging for EPUB race condition

Author: codedread

code/book.js

@@ -593,6 +593,9 @@ export class Book extends EventTarget {
       this.dispatchEvent(new BookProgressEvent(this, evt.totalPages, evt.message));
     });
 
+    if (Params['debugFetch'] === 'true') {
+      console.log(`debugFetch: Calling BookBinder.start()`);
+    }
     // Wait for its decompressing implementation to be loaded and ports connected.
     await bookBinder.start();
     this.#bookBinder = bookBinder;

code/epub/epub-book-binder.js

@@ -335,7 +335,7 @@ export class EPUBBookBinder extends BookBinder {
   /** @private */
   parseOPF_() {
     assert(this.fileMap_.has(this.opfFilename_),
-      `EPUB archive file did not have a file named '${this.opfFilename_}`);
+      `EPUB archive file did not have a file named '${this.opfFilename_}'`);
 
     const lastSlash = this.opfFilename_.lastIndexOf('/');
     const rootDir = lastSlash === -1 ? '' : this.opfFilename_.substr(0, lastSlash + 1);