method Form.is_multipart

[Petr Marhoun <petr.marhoun@…>]

I would like to write this in a general template:

{% if form.is_multipart %}

{% else %} {% endif %}

I can do it with the attached patch.

[Petr Marhoun <petr.marhoun@…>]

Again:

{% if form.is_multipart %}
    <form action="." method="post" enctype="multipart/form-data">
{% else %}
    <form action="." method="post">
{% endif %}

[murkt]

Patch with tests and documentation for rev 6268.

[Malcolm Tredinnick]

(In [6273]) Fixed #5387 -- Added is_multipart method to forms. Original patch from Petr Marhhoun. Tests and documentation from Murkt.