htmlmail--htmlmail.html.twig in HTML Mail 8.3

Sample template for HTML Mail test messages.

File

templates/htmlmail--htmlmail.html.twig

{#
/**
 * @file
 * Sample template for HTML Mail test messages.
 */
 #}
<h1><a href="https://www.drupal.org/project/htmlmail">HTML Mail</a> test message</h1>
<div class="htmlmail-body">
    {{ message.body }}
</div>
{% if debug %}
<hr />
<div class="htmlmail-debug">
    <dl>
        <dt>
            <p>To customize this test message:</p>
        </dt>
        <dd>
            <ol>
                {% if not theme %}
                <li>

                    <p>
                        Visit <u>admin/config/system/htmlmail</u>
                        and select a theme to hold your custom email template files.
                    </p>
                </li>
                {% elseif not theme_path %}
                <li>
                    <p>
                        Visit <u>admin/appearance</u>
                        to enable your selected <u>
                        {{ theme|capitalize }}</u> theme.
                    </p>
                </li>
                {% endif %}

                {% set themeTemplate = "%s/%s"|format(theme_path, message_template) %}
                {% if _self.getTemplateName() == themeTemplate  %}
                <li>
                    <p>
                        <?php endif; ?>
                        Copy the
                        <a href="https://git.drupalcode.org/project/htmlmail/raw/8.x-3.x/templates/htmlmail--htmlmail.html.twig"><code>htmlmail--htmlmail.tpl.php</code></a>
                        file to your <u>{{ theme|capitalize }}</u> theme directory
                        <u><code>{{ theme_path }}</code></u>.
                    </p>
                </li>
                {% endif %}
                <li>
                    <p>Edit the copied file.</p>
                </li>
            </ol>
        </dd>
    </dl>
</div>
{% endif %}