diff --git a/htdocs/core/class/html.formmail.class.php b/htdocs/core/class/html.formmail.class.php
index f6f2f3de562..faf7ecaf3d8 100644
--- a/htdocs/core/class/html.formmail.class.php
+++ b/htdocs/core/class/html.formmail.class.php
@@ -756,7 +756,7 @@ class FormMail extends Form
 
 				$out .= '<td>';
 
-				if ($this->withmaindocfile)	{
+				if ($this->withmaindocfile) {
 					// withmaindocfile is set to 1 or -1 to show the checkbox (-1 = checked or 1 = not checked)
 					if (GETPOSTISSET('sendmail')) {
 						$this->withmaindocfile = (GETPOST('addmaindocfile', 'alpha') ? -1 : 1);
@@ -1641,7 +1641,14 @@ class ModelMail
 	 */
 	public $label;
 
+	/**
+	 * @var string Model mail topic
+	 */
 	public $topic;
+
+	/**
+	 * @var string Model mail content
+	 */
 	public $content;
 	public $content_lines;
 	public $lang;