FIX: Regression with escaping on badge page

app/assets/javascripts/discourse/components/badge-card.js.es6

@@ -1,7 +1,6 @@
 import computed from 'ember-addons/ember-computed-decorators';
 import DiscourseURL from 'discourse/lib/url';
-import { emojiUnescape } from 'discourse/lib/text';
-import { escapeExpression } from 'discourse/lib/utilities';
+import { sanitize, emojiUnescape } from 'discourse/lib/text';
 
 export default Ember.Component.extend({
   size: 'medium',
@@ -40,10 +39,10 @@ export default Ember.Component.extend({
     if (size === 'large') {
       const longDescription = this.get('badge.long_description');
       if (!_.isEmpty(longDescription)) {
-        return emojiUnescape(escapeExpression(longDescription));
+        return emojiUnescape(sanitize(longDescription));
       }
     }
-    return escapeExpression(this.get('badge.description'));
+    return sanitize(this.get('badge.description'));
   }
 
 });

app/assets/javascripts/discourse/lib/text.js.es6

@@ -1,17 +1,25 @@
 import { default as PrettyText, buildOptions } from 'pretty-text/pretty-text';
 import { performEmojiUnescape, buildEmojiUrl } from 'pretty-text/emoji';
+import WhiteLister from 'pretty-text/white-lister';
+import { sanitize as textSanitize } from 'pretty-text/sanitizer';
 
-// Use this to easily create a pretty text instance with proper options
-export function cook(text) {
+function getOpts() {
   const siteSettings = Discourse.__container__.lookup('site-settings:main');
 
-  const opts = {
+  return buildOptions({
     getURL: Discourse.getURLWithCDN,
     currentUser: Discourse.__container__.lookup('current-user:main'),
     siteSettings
-  };
+  });
+}
 
-  return new Handlebars.SafeString(new PrettyText(buildOptions(opts)).cook(text));
+// Use this to easily create a pretty text instance with proper options
+export function cook(text) {
+  return new Handlebars.SafeString(new PrettyText(getOpts()).cook(text));
+}
+
+export function sanitize(text) {
+  return textSanitize(text, new WhiteLister(getOpts().features));
 }
 
 function emojiOptions() {

test/javascripts/acceptance/badges-test.js.es6

@@ -12,6 +12,6 @@ test("Visit Badge Pages", () => {
   andThen(() => {
     ok(exists('.badge-card'), "has the badge in the listing");
     ok(exists('.user-info'), "has the list of users with that badge");
-    ok(!exists('.badge-card:eq(0) strike'));
+    ok(!exists('.badge-card:eq(0) script'));
   });
 });

test/javascripts/fixtures/badges_fixture.js.es6

@@ -389,7 +389,7 @@ export default {
       "id": 9,
       "name": "Autobiographer",
       "description": null,
-      "long_description": "<strike>hello</strike>",
+      "long_description": "<script>hello</script>",
       "grant_count": 545,
       "allow_title": false,
       "multiple_grant": false,