Add attachment example URL

README.md

@@ -87,7 +87,7 @@ The default `trix.css` file includes styles for basic formatted content—includ
 
 Trix automatically accepts files dragged or pasted into an editor and inserts them as attachments in the document. Each attachment is considered _pending_ until you store it remotely and provide Trix with a permanent URL.
 
-To store attachments, listen for the `trix-attachment-add` event. Upload the attached files with XMLHttpRequest yourself and set the attachment’s URL attribute upon completion. See the [attachment example](…) for detailed information.
+To store attachments, listen for the `trix-attachment-add` event. Upload the attached files with XMLHttpRequest yourself and set the attachment’s URL attribute upon completion. See the [attachment example](http://trix-editor.org/js/attachments.js) for detailed information.
 
 If you don’t want to accept dropped or pasted files, call `preventDefault()` on the `trix-file-accept` event, which Trix dispatches just before the `trix-attachment-add` event.
 
@@ -332,7 +332,7 @@ The `<trix-editor>` element emits several events which you can use to observe an
 
 * `trix-file-accept` fires when a file is dropped or inserted into the editor. You can access the DOM `File` object through the `file` property on the event. Call `preventDefault` on the event to prevent attaching the file to the document.
 
-* `trix-attachment-add` fires after an attachment is added to the document. You can access the Trix attachment object through the `attachment` property on the event. If the `attachment` object has a `file` property, you should store this file remotely and set the attachment’s URL attribute. See the [attachment example](…) for detailed information.
+* `trix-attachment-add` fires after an attachment is added to the document. You can access the Trix attachment object through the `attachment` property on the event. If the `attachment` object has a `file` property, you should store this file remotely and set the attachment’s URL attribute. See the [attachment example](http://trix-editor.org/js/attachments.js) for detailed information.
 
 * `trix-attachment-remove` fires when an attachment is removed from the document. You can access the Trix attachment object through the `attachment` property on the event. You may wish to use this event to clean up remotely stored files.