it's generate this:

```html
<div class="form-group">&lt; class="col-sm-offset-3 col-sm-8"&gt;<button type="submit" name="submit" class="btn">Se connecter</button> </div>

we expect :

```html
<div class="form-group"><div class="col-sm-offset-3 col-sm-8"><button type="submit" name="submit" class="btn">Se connecter</button> </div></div>