diff --git a/src/difference/ArcanistDiffUtils.php b/src/difference/ArcanistDiffUtils.php
index a68a0532..0f798c9e 100644
--- a/src/difference/ArcanistDiffUtils.php
+++ b/src/difference/ArcanistDiffUtils.php
@@ -89,6 +89,9 @@ final class ArcanistDiffUtils extends Phobject {
     $highlight_o = '<span class="bright">';
     $highlight_c = '</span>';
 
+    $depth_in = '<span class="depth-in">';
+    $depth_out = '<span class="depth-out">';
+
     $is_html = false;
     if ($str instanceof PhutilSafeHTML) {
       $is_html = true;
@@ -107,11 +110,23 @@ final class ArcanistDiffUtils extends Phobject {
           $stack = array_shift($intra_stack);
           $s = $e;
           $e += $stack[1];
-        } while ($stack[0] == 0);
+        } while ($stack[0] === 0);
+
+        switch ($stack[0]) {
+          case '>':
+            $open_tag = $depth_in;
+            break;
+          case '<':
+            $open_tag = $depth_out;
+            break;
+          default:
+            $open_tag = $highlight_o;
+            break;
+        }
       }
 
       if (!$highlight && !$tag && !$ent && $p == $s) {
-        $buf .= $highlight_o;
+        $buf .= $open_tag;
         $highlight = true;
       }
 
@@ -139,7 +154,7 @@ final class ArcanistDiffUtils extends Phobject {
       if ($tag && $str[$i] == '>') {
         $tag = false;
         if ($highlight) {
-          $buf .= $highlight_o;
+          $buf .= $open_tag;
         }
       }
 
diff --git a/src/lint/linter/__tests__/jshint/jshint.lint-test b/src/lint/linter/__tests__/jshint/jshint.lint-test
index 37c13892..edb1c779 100644
--- a/src/lint/linter/__tests__/jshint/jshint.lint-test
+++ b/src/lint/linter/__tests__/jshint/jshint.lint-test
@@ -9,4 +9,4 @@ function f() {
 ~~~~~~~~~~
 warning:3:8
 error:7:1
-error:9:
+error:9:1
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
index b2fa6770..f3dd662e 100644
--- a/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
@@ -26,6 +26,7 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
     $whitelist = array(
       'class'    => array(),
       'function' => array(),
+      'constant' => array(),
     );
 
     $conditionals = $root->selectDescendantsOfType('n_IF');
@@ -51,6 +52,7 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
         case 'class_exists':
         case 'function_exists':
         case 'interface_exists':
+        case 'defined':
           $type = null;
           switch ($function_name) {
             case 'class_exists':
@@ -64,6 +66,10 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
             case 'interface_exists':
               $type = 'interface';
               break;
+
+            case 'defined':
+              $type = 'constant';
+              break;
           }
 
           $params = $function->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
@@ -98,7 +104,6 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
       $min = idx($version, 'php.min');
       $max = idx($version, 'php.max');
 
-      // Check if whitelisted.
       $whitelisted = false;
       foreach (idx($whitelist['function'], $name, array()) as $range) {
         if (array_intersect($range, array_keys($node->getTokens()))) {
@@ -178,18 +183,18 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
       $version = idx($compat_info['classes'], $name, $version);
       $min = idx($version, 'php.min');
       $max = idx($version, 'php.max');
-        // Check if whitelisted.
-        $whitelisted = false;
-        foreach (idx($whitelist['class'], $name, array()) as $range) {
-          if (array_intersect($range, array_keys($node->getTokens()))) {
-            $whitelisted = true;
-            break;
-          }
-        }
 
-        if ($whitelisted) {
-          continue;
+      $whitelisted = false;
+      foreach (idx($whitelist['class'], $name, array()) as $range) {
+        if (array_intersect($range, array_keys($node->getTokens()))) {
+          $whitelisted = true;
+          break;
         }
+      }
+
+      if ($whitelisted) {
+        continue;
+      }
 
       if ($min && version_compare($min, $this->version, '>')) {
         $this->raiseLintAtNode(
@@ -225,6 +230,18 @@ final class ArcanistPHPCompatibilityXHPASTLinterRule
       $min = idx($version, 'php.min');
       $max = idx($version, 'php.max');
 
+      $whitelisted = false;
+      foreach (idx($whitelist['constant'], $name, array()) as $range) {
+        if (array_intersect($range, array_keys($node->getTokens()))) {
+          $whitelisted = true;
+          break;
+        }
+      }
+
+      if ($whitelisted) {
+        continue;
+      }
+
       if ($min && version_compare($min, $this->version, '>')) {
         $this->raiseLintAtNode(
           $node,
diff --git a/src/workflow/ArcanistDiffWorkflow.php b/src/workflow/ArcanistDiffWorkflow.php
index 28b91a3f..a427846b 100644
--- a/src/workflow/ArcanistDiffWorkflow.php
+++ b/src/workflow/ArcanistDiffWorkflow.php
@@ -1852,17 +1852,56 @@ EOTEXT
           $this->checkRevisionOwnership(head($result));
           break;
         case 'reviewers':
-          $untils = array();
+          $away = array();
           foreach ($result as $user) {
-            if (idx($user, 'currentStatus') == 'away') {
-              $untils[] = $user['currentStatusUntil'];
+            if (idx($user, 'currentStatus') != 'away') {
+              continue;
             }
+
+            $username = $user['userName'];
+            $real_name = $user['realName'];
+
+            if (strlen($real_name)) {
+              $name = pht('%s (%s)', $username, $real_name);
+            } else {
+              $name = pht('%s', $username);
+            }
+
+            $away[] = array(
+              'name' => $name,
+              'until' => $user['currentStatusUntil'],
+            );
           }
-          if (count($untils) == count($reviewers)) {
-            $until = date('l, M j Y', min($untils));
-            $confirm = pht(
-              'All reviewers are away until %s. Continue anyway?',
-              $until);
+
+          if ($away) {
+            if (count($away) == count($reviewers)) {
+              $earliest_return = min(ipull($away, 'until'));
+
+              $message = pht(
+                'All reviewers are away until %s:',
+                date('l, M j Y', $earliest_return));
+            } else {
+              $message = pht('Some reviewers are currently away:');
+            }
+
+            echo tsprintf(
+              "%s\n\n",
+              $message);
+
+            $list = id(new PhutilConsoleList());
+            foreach ($away as $spec) {
+              $list->addItem(
+                pht(
+                  '%s (until %s)',
+                  $spec['name'],
+                  date('l, M j Y', $spec['until'])));
+            }
+
+            echo tsprintf(
+              '%B',
+              $list->drawConsoleString());
+
+            $confirm = pht('Continue even though reviewers are unavailable?');
             if (!phutil_console_confirm($confirm)) {
               throw new ArcanistUsageException(
                 pht('Specify available reviewers and retry.'));