Issue #2232881 by danblack: pdo used to require comment escaping - doesn'\''t on supported versions

core/lib/Drupal/Core/Database/Driver/mysql/Schema.php

@@ -474,9 +474,6 @@ public function changeField($table, $field, $field_new, $spec, $keys_new = array
   }
 
   public function prepareComment($comment, $length = NULL) {
-    // Work around a bug in some versions of PDO, see http://bugs.php.net/bug.php?id=41125
-    $comment = str_replace("'", '’', $comment);
-
     // Truncate comment to maximum comment length.
     if (isset($length)) {
       // Add table prefixes before truncating.