Convert some application helpers to ES6 format.

app/assets/javascripts/admin/templates/users_list.js.handlebars

@@ -68,9 +68,9 @@
             <td>{{#link-to 'adminUser' this}}{{avatar this imageSize="small"}}{{/link-to}}</td>
             <td>{{#link-to 'adminUser' this}}{{unbound username}}{{/link-to}}</td>
             {{#if active}}
-              <td>{{shorten email}}</td>
+              <td>{{shorten-text email}}</td>
             {{else}}
-              <td title="{{i18n admin.users.not_verified}}">{{shorten email}}</td>
+              <td title="{{i18n admin.users.not_verified}}">{{shorten-text email}}</td>
             {{/if}}
             <td>{{{unbound last_emailed_age}}}</td>
             <td>{{{unbound last_seen_age}}}</td>

app/assets/javascripts/discourse/helpers/application_helpers.js

@@ -1,28 +1,5 @@
 var safe = Handlebars.SafeString;
 
-/**
-  Truncates long strings
-
-  @method shorten
-  @for Handlebars
-**/
-Handlebars.registerHelper('shorten', function(property, options) {
-  return Ember.Handlebars.get(this, property, options).substring(0,35);
-});
-
-/**
-  Produces a link to a topic
-
-  @method topic-link
-  @for Handlebars
-**/
-Handlebars.registerHelper('topic-link', function(property, options) {
-  var topic = Ember.Handlebars.get(this, property, options),
-      title = topic.get('fancy_title');
-  return "<a href='" + topic.get('lastUnreadUrl') + "' class='title'>" + title + "</a>";
-});
-
-
 /**
   Produces a link to a category given a category object and helper options
 
@@ -91,25 +68,6 @@ Handlebars.registerHelper('titled-link-to', function(name, object) {
   }
 });
 
-/**
-  Shorten a URL for display by removing common components
-
-  @method shortenUrl
-  @for Handlebars
-**/
-Handlebars.registerHelper('shorten-url', function(property, options) {
-  var url, matches;
-  url = Ember.Handlebars.get(this, property, options);
-  // Remove trailing slash if it's a top level URL
-  matches = url.match(/\//g);
-  if (matches && matches.length === 3) {
-    url = url.replace(/\/$/, '');
-  }
-  url = url.replace(/^https?:\/\//, '');
-  url = url.replace(/^www\./, '');
-  return url.substring(0,80);
-});
-
 /**
   Bound avatar helper.
 

app/assets/javascripts/discourse/helpers/shorten-text.js.es6

@@ -0,0 +1,3 @@
+export default Handlebars.registerHelper('shorten-text', function(property, options) {
+  return Ember.Handlebars.get(this, property, options).substring(0,35);
+});

app/assets/javascripts/discourse/helpers/shorten-url.js.es6

@@ -0,0 +1,12 @@
+export default Handlebars.registerHelper('shorten-url', function(property, options) {
+  var url = Ember.Handlebars.get(this, property, options),
+      matches = url.match(/\//g);
+
+  if (matches && matches.length === 3) {
+    url = url.replace(/\/$/, '');
+  }
+  url = url.replace(/^https?:\/\//, '');
+  url = url.replace(/^www\./, '');
+  return url.substring(0, 80);
+});
+

app/assets/javascripts/discourse/helpers/topic-link.js.es6

@@ -0,0 +1,6 @@
+export default Handlebars.registerHelper('topic-link', function(property, options) {
+  var topic = Ember.Handlebars.get(this, property, options),
+      title = topic.get('fancy_title');
+
+  return new Handlebars.SafeString("<a href='" + topic.get('lastUnreadUrl') + "' class='title'>" + title + "</a>");
+});

app/assets/javascripts/discourse/templates/composer/similar_topics.js.handlebars

@@ -3,6 +3,6 @@
 
 <ul class='topics'>
   {{#each similarTopics}}
-    <li>{{{topic-link this}}} <span class='posts-count'>({{{i18n topic.filters.n_posts count="posts_count"}}})</span></li>
+    <li>{{topic-link this}} <span class='posts-count'>({{{i18n topic.filters.n_posts count="posts_count"}}})</span></li>
   {{/each}}
 </ul>

app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars

@@ -12,7 +12,7 @@
 
 <td class='main-link clearfix' {{bind-attr colspan="titleColSpan"}}>
   {{topic-status topic=this.model}}
-  {{{topic-link this}}}
+  {{topic-link this}}
   {{topic-post-badges unread=unread newPosts=displayNewPosts unseen=unseen url=lastUnreadUrl}}
 
   {{#if hasExcerpt}}

app/assets/javascripts/discourse/templates/mobile/components/basic-topic-list.js.handlebars

@@ -6,8 +6,7 @@
           <td>
             <div class='main-link clearfix'>
               {{topic-status topic=this}}
-              {{{topic-link this}}}
-
+              {{topic-link this}}
               {{topic-post-badges unread=unread
                                   newPosts=topic.new_posts
                                   unseen=topic.unseen

app/assets/javascripts/discourse/templates/mobile/discovery/categories.js.handlebars

@@ -20,7 +20,7 @@
           <td class='main-link'>
             <div class='topic-inset'>
               {{topic-status topic=this}}
-              {{{topic-link this}}}
+              {{topic-link this}}
 
               {{topic-post-badges unread=unread newPosts=new_posts unseen=unseen url=lastUnreadUrl}}
               {{#if hasExcerpt}}

app/assets/javascripts/discourse/templates/mobile/list/topic_list_item.js.handlebars

@@ -1,7 +1,7 @@
 <td>
 <div class='main-link clearfix'>
   {{topic-status topic=this}}
-  {{{topic-link this}}}
+  {{topic-link this}}
   {{topic-post-badges unread=unread
                       newPosts=displayNewPosts
                       unseen=unseen