Pass the full CommonMark spec

app/assets/javascripts/pretty-text/engines/discourse-markdown-it.js.es6

@@ -213,7 +213,7 @@ export function setup(opts, siteSettings, state) {
     html: true,
     breaks: opts.discourse.features.newline,
     xhtmlOut: false,
-    linkify: true,
+    linkify: opts.discourse.features.linkify,
     typographer: siteSettings.enable_markdown_typographer
   });
 

app/assets/javascripts/pretty-text/engines/discourse-markdown/code.js.es6

@@ -13,7 +13,7 @@ function render(tokens, idx, options, env, slf, md) {
 
   if (info) {
     // strip off any additional languages
-    info = info.split(/\s+/g)[0];
+    info = info.trim().split(/\s+/g)[0];
   }
 
   const acceptableCodeClasses = md.options.discourse.acceptableCodeClasses;
@@ -23,7 +23,7 @@ function render(tokens, idx, options, env, slf, md) {
 
   className = TEXT_CODE_CLASSES.indexOf(info) !== -1 ? 'lang-nohighlight' : 'lang-' + langName;
 
-  return `<pre><code class='${className}'>${escapedContent}</code></pre>\n`;
+  return `<pre><code class="${className}">${escapedContent}</code></pre>\n`;
 }
 
 export function setup(helper) {

app/assets/javascripts/pretty-text/pretty-text.js.es6

@@ -21,7 +21,8 @@ export function buildOptions(state) {
     lookupAvatarByPostNumber,
     emojiUnicodeReplacer,
     lookupInlineOnebox,
-    previewing
+    previewing,
+    linkify
   } = state;
 
   let features = {
@@ -33,6 +34,7 @@ export function buildOptions(state) {
     'html': true,
     'category-hashtag': true,
     'onebox': true,
+    'linkify': linkify !== false,
     'newline': !siteSettings.traditional_markdown_linebreaks
   };