web/web_ckeditor4/templates/assets.xml

<?xml version="1.0" encoding="UTF-8"?>
<odoo>
    <template id="assets_backend" name="web_ckeditor4 assets"
                    inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script type="text/javascript"
                    src="/web_ckeditor4/static/src/js/ckeditor_basepath.js" />
            <script type="text/javascript"
                    src="/web_ckeditor4/static/lib/ckeditor/ckeditor.js" />
            <script type="text/javascript"
                    src="/web_ckeditor4/static/lib/ckeditor/config.js" />
            <script type="text/javascript"
                    src="/web_ckeditor4/static/src/js/web_ckeditor4_config.js" />
            <script type="text/javascript"
                    src="/web_ckeditor4/static/src/js/web_ckeditor4_formview.js" />
            <script type="text/javascript"
                    src="/web_ckeditor4/static/src/js/web_ckeditor4.js" />
        </xpath>
    </template>
</odoo>