Added missing information about File.open_encrypted function to docs
@@ -257,6 +257,7 @@
</argument>
<description>
Opens an encrypted file in write or read mode. You need to pass a binary key to encrypt/decrypt it.
+ [b]Note:[/b] The provided key must be 32 bytes long.
</description>
</method>
<method name="open_encrypted_with_pass">