diff -u b/core/modules/picture/picture.module b/core/modules/picture/picture.module
--- b/core/modules/picture/picture.module
+++ b/core/modules/picture/picture.module
@@ -84,13 +84,6 @@
  * Implements hook_library_info().
  */
 function picture_library_info() {
-  // This is an adapted version of the polyfill:
-  // - Title was missing, to stay as close as possible to img, we added it.
-  //   @see https://github.com/ResponsiveImagesCG/picture-element/issues/51
-  // - Width and height are added to avoid reflow.
-  //   @see https://github.com/ResponsiveImagesCG/picture-element/issues/50
-  // - Use of querySelectorAll, to improve speed, since we don't support IE8.
-  // - Uses domready to be inline with other Drupal 8 js.
   $libraries['picturefill'] = array(
     'title' => t('Picturefill'),
     'website' => 'http://drupal.org/node/1775530',
diff -u b/core/modules/picture/picturefill/picturefill.js b/core/modules/picture/picturefill/picturefill.js
--- b/core/modules/picture/picturefill/picturefill.js
+++ b/core/modules/picture/picturefill/picturefill.js
@@ -1,5 +1,14 @@
 /*jshint loopfunc: true, browser: true, curly: true, eqeqeq: true, expr: true, forin: true, latedef: true, newcap: true, noarg: true, trailing: true, undef: true, unused: true */
-/*! Picturefill - Author: Scott Jehl, 2012 | License: MIT/GPLv2 */
+/*! Original Picturefill - Author: Scott Jehl, 2012 | License: MIT/GPLv2 */
+/*
+ * This is an adapted version of the polyfill:
+ * - Title was missing, to stay as close as possible to img, we added it.
+ *   @see https://github.com/ResponsiveImagesCG/picture-element/issues/51
+ * - Width and height are added to avoid reflow.
+ *   @see https://github.com/ResponsiveImagesCG/picture-element/issues/50
+ * - Use of querySelectorAll, to improve speed, since we don't support IE8.
+ * - Uses domready to be inline with other Drupal 8 js.
+ */
 (function (w, domready) {
 
   // Enable strict mode.