old_contents: from django import forms
  from django.utils.translation import ugettext as _
  
  class SearchForm(forms.Form):
  	search		=	forms.CharField(label=_('Nome'), max_length=200, required=False)
  
new_contents: from django import forms
  from django.utils.translation import ugettext as _
  
  class SearchForm(forms.Form):
  	search		=	forms.CharField(label=_('Nome'), widget=forms.TextInput(attrs={'class': 'input-medium search-query'}), max_length=200, required=False)
  
subject: Update forms.py