Correct example for alert-danger

Author: surfer190

bootstrap3/templatetags/bootstrap3.py

@@ -679,7 +679,7 @@ def bootstrap_alert(content, alert_type='info', dismissable=True):
 
     **Example**::
 
-        {% bootstrap_alert "Something went wrong" alert_type='error' %}
+        {% bootstrap_alert "Something went wrong" alert_type='danger' %}
 
     """
     return render_alert(content, alert_type, dismissable)