bind: Minor i18n updates

- Use a proper i18n label for 'Forwarders' fields instead of auto-generated one.

- Reuse an already used success message for form submission so that a new
  message is not introduced for l10n.

- Minor styling fixes and a yapf run.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/bind/__init__.py

@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 """
-Plinth module to configure BIND server
+Plinth module to configure BIND server.
 """
 
 import re

plinth/modules/bind/forms.py

@@ -34,9 +34,9 @@ def validate_ips(ips):
 class BindForm(ServiceForm):
     """BIND configuration form"""
     forwarders = forms.CharField(
-        required=False, validators=[validate_ips], help_text=_(
-            'A list DNS servers, separated by space, to which '
-            'requests will be forwarded'))
+        label=_('Forwarders'), required=False, validators=[validate_ips],
+        help_text=_('A list DNS servers, separated by space, to which '
+                    'requests will be forwarded'))
 
     enable_dnssec = forms.BooleanField(
         label=_('Enable DNSSEC'), required=False,

plinth/modules/bind/urls.py

@@ -14,16 +14,12 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
-
 """
-URLs for the BIND module
+URLs for the BIND module.
 """
 
 from django.conf.urls import url
 
 from plinth.modules.bind.views import BindServiceView
 
-
-urlpatterns = [
-    url(r'^sys/bind/$', BindServiceView.as_view(), name='index'),
-]
+urlpatterns = [url(r'^sys/bind/$', BindServiceView.as_view(), name='index'), ]

plinth/modules/bind/views.py

@@ -54,6 +54,6 @@ class BindServiceView(ServiceView):  # pylint: disable=too-many-ancestors
                 'configure', '--forwarders', data['forwarders'], '--dnssec',
                 dnssec_setting
             ])
-            messages.success(self.request, _('BIND configuration updated'))
+            messages.success(self.request, _('Configuration updated'))
 
         return super().form_valid(form)