Minor comment updates

src/components/views/messages/TextualBody.js

@@ -248,7 +248,7 @@ module.exports = createReactClass({
             const url = node.getAttribute("href");
             const host = url.match(/^https?:\/\/(.*?)(\/|$)/)[1];
 
-            // never preview matrix.to links (if anything we should give a smart
+            // never preview permalinks (if anything we should give a smart
             // preview of the room/user they point to: nobody needs to be reminded
             // what the matrix.to site looks like).
             if (isPermalinkHost(host)) return false;

src/components/views/rooms/MessageComposerInput.js

@@ -536,7 +536,7 @@ export default class MessageComposerInput extends React.Component {
 
         const textWithMdPills = this.plainWithMdPills.serialize(editorState);
         const markdown = new Markdown(textWithMdPills);
-        // HTML deserialize has custom rules to turn matrix.to links into pill objects.
+        // HTML deserialize has custom rules to turn permalinks into pill objects.
         return this.html.deserialize(markdown.toHTML());
     }