{% extends 'layouts/topic.html' %}
{% block content %}
    <form action="" method="post">
    {% csrf_token %}
    <label>
        <textarea class="topic-text-area" name="text">{{ topic_text }}</textarea>
    </label>
    <input type="submit" value="Save this page" class="topic-edit-link">

    </form>
{% endblock %}

{% extends 'layouts/topic.html' %}
{% block content %}
    <form action="" method="post">
    {% csrf_token %}
    <label>
        <textarea class="topic-text-area" name="text" placeholder="Add content here...">{{ topic_text }}</textarea>
    </label>
    <input type="submit" value="Save this page" class="topic-edit-link">

    </form>
{% endblock %}

Add placeholder text to editing page content
Add placeholder text to editing page content
