Merge pull request zostera#183 from frlan/patch-1

Correct example from documentation to fit with syntax for bootstrap_form...

Author: Dylan Verheul

bootstrap3/templatetags/bootstrap3.py

@@ -318,7 +318,7 @@ def bootstrap_field(*args, **kwargs):
 
     **example**::
 
-        {% bootstrap_form form_field form.subject %}
+        {% bootstrap_form form_field %}
     """
     return render_field(*args, **kwargs)