diff --git a/core/lib/Drupal/Component/Gettext/PoItem.php b/core/lib/Drupal/Component/Gettext/PoItem.php
index 3730c06..e7edbff 100644
--- a/core/lib/Drupal/Component/Gettext/PoItem.php
+++ b/core/lib/Drupal/Component/Gettext/PoItem.php
@@ -256,8 +256,8 @@ private function formatPlural() {
    */
   private function formatSingular() {
     $output = '';
-    $output .= 'msgid '. $this->formatString($this->_source);
-    $output .= 'msgstr '. (isset($this->_translation) ? $this->formatString($this->_translation) : '""');
+    $output .= 'msgid ' . $this->formatString($this->_source);
+    $output .= 'msgstr ' . (isset($this->_translation) ? $this->formatString($this->_translation) : '""');
     return $output;
   }