def execute():
    frappe.rename_doc('DocType', 'Newsletter List', 'Email Group')
    frappe.rename_doc('DocType', 'Newsletter List Subscriber', 'Email Group Member')
def execute():
    frappe.rename_doc('DocType', 'Newsletter List', 'Email Group')
    frappe.rename_doc('DocType', 'Newsletter List Subscriber', 'Email Group Member')