diff --git a/core/modules/file/file.field.inc b/core/modules/file/file.field.inc
index 8552da0..50b913f 100644
--- a/core/modules/file/file.field.inc
+++ b/core/modules/file/file.field.inc
@@ -180,7 +180,7 @@ function template_preprocess_file_upload_help(&$variables) {
     }
   }
   if (isset($upload_validators['file_validate_size'])) {
-    $descriptions[] = t('!size limit.', array('!size' => format_size($upload_validators['file_validate_size'][0])));
+    $descriptions[] = t('@size limit.', array('@size' => format_size($upload_validators['file_validate_size'][0])));
   }
   if (isset($upload_validators['file_validate_extensions'])) {
     $descriptions[] = t('Allowed types: @extensions.', array('@extensions' => $upload_validators['file_validate_extensions'][0]));
diff --git a/core/modules/migrate/src/MigrateExecutable.php b/core/modules/migrate/src/MigrateExecutable.php
index 70c61d1..bc86158 100644
--- a/core/modules/migrate/src/MigrateExecutable.php
+++ b/core/modules/migrate/src/MigrateExecutable.php
@@ -426,10 +426,10 @@ protected function memoryExceeded() {
     }
     if ($pct_memory > $threshold) {
       $this->message->display(
-        $this->t('Memory usage is !usage (!pct% of limit !limit), reclaiming memory.',
-          array('!pct' => round($pct_memory*100),
-                '!usage' => $this->formatSize($usage),
-                '!limit' => $this->formatSize($this->memoryLimit))),
+        $this->t('Memory usage is @usage (@pct% of limit @limit), reclaiming memory.',
+          array('@pct' => round($pct_memory*100),
+                '@usage' => $this->formatSize($usage),
+                '@limit' => $this->formatSize($this->memoryLimit))),
         'warning');
       $usage = $this->attemptMemoryReclaim();
       $pct_memory = $usage / $this->memoryLimit;
@@ -437,19 +437,19 @@ protected function memoryExceeded() {
       // coming back here and trimming a tiny amount
       if ($pct_memory > (0.90 * $threshold)) {
         $this->message->display(
-          $this->t('Memory usage is now !usage (!pct% of limit !limit), not enough reclaimed, starting new batch',
-            array('!pct' => round($pct_memory*100),
-                  '!usage' => $this->formatSize($usage),
-                  '!limit' => $this->formatSize($this->memoryLimit))),
+          $this->t('Memory usage is now @usage (@pct% of limit @limit), not enough reclaimed, starting new batch',
+            array('@pct' => round($pct_memory*100),
+                  '@usage' => $this->formatSize($usage),
+                  '@limit' => $this->formatSize($this->memoryLimit))),
           'warning');
         return TRUE;
       }
       else {
         $this->message->display(
-          $this->t('Memory usage is now !usage (!pct% of limit !limit), reclaimed enough, continuing',
-            array('!pct' => round($pct_memory*100),
-                  '!usage' => $this->formatSize($usage),
-                  '!limit' => $this->formatSize($this->memoryLimit))),
+          $this->t('Memory usage is now @usage (@pct% of limit @limit), reclaimed enough, continuing',
+            array('@pct' => round($pct_memory*100),
+                  '@usage' => $this->formatSize($usage),
+                  '@limit' => $this->formatSize($this->memoryLimit))),
           'warning');
         return FALSE;
       }