Insert data using php to html textarea in mustache template [closed]

I read multi-line data using php from a database which has been previously validated on insertion. To create an editable form I’m using a Mustache template containing html form data with data inserted from php. SFSG with standard form elements (text, number).

However I’m not having success with trying to insert the data into a textarea with:

<div>
  <label col-sm-2" for="description">Article description:</label>
  <br>
  <textarea  name="description" rows="8" cols="45" <?php echo {{adescription}}; ?></textarea>
</div> 

Where adescription is the data item holding the text read from the database.

What I would like to achieve is that text is editable in the textarea so I can have the user edit it and then I’d check it and put it back in the database again.