In html2xt, move class to end

[pydanny]

The cls argument is now moved to the end of the result of the html2xt function. So this:

<form>
  <fieldset>
    <input id="title" class="char" name="title" value="Profit"></input>
    <label>
      <input type="checkbox" data-foo="bar" id="done" class="checkboxer" name="done" checked="1"></input>
Done
    </label>
    <input type="hidden" id="id" name="id" value="2"></input>
    <textarea id="details" name="details">Details</textarea>
    <button>Save</button>
  </fieldset>
</form>

becomes this:

python
Form(
    Fieldset(
        Input(id='title', name='title', value='Profit', cls='char'),
        Label(
            Input(type='checkbox', data_foo='bar', id='done', name='done', checked='1', cls='checkboxer'),
            'Done'
        ),
        Input(type='hidden', id='id', name='id', value='2'),
        Textarea('Details', id='details', name='details'),
        Button('Save')
    )
)