Allow lint messages to be rendered as Remarkup

Summary: Some linter messages, such as those produced by `ArcanistPHPCompatibilityXHPASTLinterRule`, contain backticks but are currently rendered as Remarkup literals. I think that it is generally desirable to allow lint messages to be rendered as Remarkup, although we should ideally have a way to render Remarkup for use on the command line (I actually think that this already exists, but I don't think that `arc lint` does this when rendering linter messages).

Test Plan: Resubmitted D14481 to my dev install and saw Remarkuped lint messages.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D14485

src/applications/differential/controller/DifferentialChangesetViewController.php

@@ -387,7 +387,6 @@ final class DifferentialChangesetViewController extends DifferentialController {
     $inlines = array();
     foreach ($messages as $message) {
       $description = $message->getProperty('description');
-      $description = '%%%'.$description.'%%%';
 
       $inlines[] = id(clone $template)
         ->setSyntheticAuthor(pht('Lint: %s', $message->getName()))

src/infrastructure/diff/view/PHUIDiffInlineCommentDetailView.php

@@ -227,9 +227,7 @@ final class PHUIDiffInlineCommentDetailView
 
       $action_buttons = array();
       if ($this->allowReply) {
-
         if (!$is_synthetic) {
-
           // NOTE: No product reason why you can't reply to these, but the reply
           // mechanism currently sends the inline comment ID to the server, not
           // file/line information, and synthetic comments don't have an inline
@@ -242,7 +240,6 @@ final class PHUIDiffInlineCommentDetailView
             ->addSigil('differential-inline-reply')
             ->setMustCapture(true);
         }
-
       }
     }