diff --git a/contact_attach.module b/contact_attach.module
index c774b89..95db720 100644
--- a/contact_attach.module
+++ b/contact_attach.module
@@ -44,7 +44,7 @@ function contact_attach_permission() {
     ),
     'send attachments with user contact forms' => array(
       'title' => t('Send attachments with user contact forms'),
-      'description' => t("Send e-mails with attachments from user contact forms."),
+      'description' => t('Send e-mails with attachments from user contact forms.'),
     ),
   );
 
@@ -144,7 +144,7 @@ function contact_attach_contact_form_validate($form, &$form_state) {
   foreach ($_FILES['files']['name'] as $temp_name => $file_name) {
     $file = file_save_upload($temp_name, $validators);
     if ($file === FALSE) {
-      form_set_error($temp_name, t("Failed to attach the file %name.", array('%name' => $file_name)));
+      form_set_error($temp_name, t('Failed to attach the file %name.', array('%name' => $file_name)));
     }
   }
 }
@@ -350,11 +350,11 @@ function _contact_attach_process_attachments($message) {
  *   The processed attachment, ready for appending to the message.
  */
 function _contact_attach_add_attachment($file) {
-  $attachment  = "Content-Type: " . $file->filemime . "; name=\"" . basename($file->filename) . "\"\n";
+  $attachment  = 'Content-Type: ' . $file->filemime . '; name="' . basename($file->filename) . "\"\n";
   $attachment .= "Content-Transfer-Encoding: base64\n";
   // SMTP module pulls the file path from the filename property, so it can not
   // be just the file name.
-  $attachment .= "Content-Disposition: attachment; filename=\"" . $file->uri . "\"\n\n";
+  $attachment .= 'Content-Disposition: attachment; filename="' . $file->uri . "\"\n\n";
   if (file_exists($file->uri)) {
     $attachment .= chunk_split(base64_encode(file_get_contents($file->uri)));
   }