diff -u b/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
--- b/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -21,27 +21,27 @@
     case 'admin/help#aggregator':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Aggregator module is an on-site syndicator and news reader that gathers and displays fresh content from RSS, RDF, and Atom based feeds made available across the web. Thousands of sites (particularly news sites and blogs) publish their latest headlines in feeds, using a number of standardized XML-based formats. For more information, see the <a href="!aggregator-module">online documentation for the Aggregator module</a>.', array('!aggregator-module' => 'https://drupal.org/documentation/modules/aggregator')). '</p>';
+      $output .= '<p>' . t('The Aggregator module is an on-site syndicator and news reader that gathers and displays fresh content from RSS-, RDF-, and Atom-based feeds made available across the web. Thousands of sites (particularly news sites and blogs) publish their latest headlines in feeds, using a number of standardized XML-based formats. For more information, see the <a href="!aggregator-module">online documentation for the Aggregator module</a>.', array('!aggregator-module' => 'https://drupal.org/documentation/modules/aggregator')). '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Viewing feeds') . '</dt>';
-      $output .= '<dd>' . t('Feeds contain published content, and may be grouped in categories, generally by topic. Users view feed content in the <a href="!aggregator">main aggregator display</a>, or by <a href="!aggregator-sources" title="Link to the original content of a feed.">their source</a> (usually via an RSS feed reader). The most recent content in a feed or category can be displayed as a block through the <a href="!admin-block">Blocks administration page</a>.', array('!aggregator' => \Drupal::url('aggregator.page_last'), '!aggregator-sources' => \Drupal::url('aggregator.sources'), '!admin-block' => \Drupal::url('block.admin_display'))) . '</a></dd>';
+      $output .= '<dd>' . t('Feeds contain published content, and may be grouped in categories, generally by topic. Users view feed content in the <a href="!aggregator">main aggregator display</a>, or by <a href="!aggregator-sources">their source</a> (usually via an RSS feed reader). The most recent content in a feed or category can be displayed as a block through the <a href="!admin-block">Blocks administration page</a>.', array('!aggregator' => \Drupal::url('aggregator.page_last'), '!aggregator-sources' => \Drupal::url('aggregator.sources'), '!admin-block' => \Drupal::url('block.admin_display'))) . '</a></dd>';
       $output .= '<dt>' . t('Adding, editing, and deleting feeds') . '</dt>';
       $output .= '<dd>' . t('Administrators can add, edit, and delete feeds, and choose how often to check each feed for newly updated items on the <a href="!feededit">Feed aggregator administration page</a>.', array('!feededit' => \Drupal::url('aggregator.admin_overview'))) . '</dd>';
-      $output .= '<dt>' . t('<abbr title="Outline Processor Markup Language">OPML</abbr> integration') . '</dt>';
-      $output .= '<dd>' . t('OPML is an XML-based file format used to share outline-structured information such as a list of RSS feeds. OPML Feeds can be <a href="!import-opml">imported via an OPML file</a>.', array('!import-opml' => \Drupal::url('aggregator.admin_overview'))) . '</dd>';
+      $output .= '<dt>' . t('OPML integration') . '</dt>';
+      $output .= '<dd>' . t('A <a href="!aggregator-opml">machine-readable OPML file</a> of all feeds is available. OPML is an XML-based file format used to share outline-structured information such as a list of RSS feeds. Feeds can also be <a href="!import-opml">imported via an OPML file</a>.', array('!aggregator-opml' => \Drupal::url('aggregator.opml_page'), '!import-opml' => \Drupal::url('aggregator.admin_overview'))) . '</dd>';
       $output .= '<dt>' . t('Configuring cron') . '</dt>';
       $output .= '<dd>' . t('A correctly configured <a href="!cron">cron maintenance task</a> is required to update feeds automatically.', array('!cron' => \Drupal::url('system.cron_settings'))) . '</dd>';
       $output .= '</dl>';
       return $output;
     case 'admin/config/services/aggregator':
       $output = '<p>' . t('Thousands of sites (particularly news sites and blogs) publish their latest headlines and posts in feeds, using a number of standardized XML-based formats. Formats supported by the aggregator include <a href="!rss">RSS</a>, <a href="!rdf">RDF</a>, and <a href="!atom">Atom</a>.', array('!rss' => 'http://cyber.law.harvard.edu/rss/', '!rdf' => 'http://www.w3.org/RDF/', '!atom' => 'http://www.atomenabled.org')) . '</p>';
-      $output .= '<p>' . t('Current feeds are listed below, and <a href="!addfeed">new feeds may be added</a>. For each feed or feed category, the <em>latest items</em> block may be enabled at the <a href="!block">blocks administration page</a>.', array('!addfeed' => \Drupal::url('aggregator.feed_add'), '!block' => \Drupal::url('block.admin_display'))) . '</p>';
+      $output .= '<p>' . t('Current feeds are listed below, and <a href="!addfeed">new feeds may be added</a>. At the <a href="!block">blocks administration page</a> you can enable for each feed the block <em>Aggregator feed</a> that contains the <em>latest items</em> .', array('!addfeed' => \Drupal::url('aggregator.feed_add'), '!block' => url('admin/structure/block'))) . '</p>';
       return $output;
     case 'admin/config/services/aggregator/add/feed':
       return '<p>' . t('Add a feed in RSS, RDF or Atom format. A feed may only have one entry.') . '</p>';
     case 'admin/config/services/aggregator/add/opml':
-      return '<p>' . t('<abbr title="Outline Processor Markup Language">OPML</abbr> is an XML format used to exchange multiple feeds between aggregators. A single OPML document may contain a collection of many feeds. Drupal can parse such a file and import all feeds at once, saving you the effort of adding them manually. You may either upload a local file from your computer or enter a URL where Drupal can download it.') . '</p>';
+      return '<p>' . t('<acronym title="Outline Processor Markup Language">OPML</acronym> is an XML format used to exchange multiple feeds between aggregators. A single OPML document may contain a collection of many feeds. Drupal can parse such a file and import all feeds at once, saving you the effort of adding them manually. You may either upload a local file from your computer or enter a URL where Drupal can download it.') . '</p>';
   }
 }