Minor PEP8 & spelling fixes in various modules

plinth/modules/apps/apps.py

@@ -23,8 +23,8 @@ from plinth import cfg
 
 def init():
     """Initailize the apps module"""
-    cfg.main_menu.add_urlname(_('Apps'), 'glyphicon-download-alt', 'apps:index',
-                              80)
+    cfg.main_menu.add_urlname(_('Apps'), 'glyphicon-download-alt',
+                              'apps:index', 80)
 
 
 def index(request):

plinth/modules/config/config.py

@@ -226,7 +226,7 @@ def _apply_changes(request, old_status, new_status):
             request.session[translation.LANGUAGE_SESSION_KEY] = language
         except Exception as exception:
             messages.error(request, _('Error setting language: {exception}')
-                            .format(exception=exception))
+                           .format(exception=exception))
         else:
             messages.success(request, _('Language changed'))
 

plinth/modules/firewall/views.py

@@ -26,7 +26,7 @@ import plinth.service as service_module
 
 
 def index(request):
-    """Serve introcution page"""
+    """Serve introduction page"""
     if not firewall.get_enabled_status():
         return TemplateResponse(request, 'firewall.html',
                                 {'title': firewall.title,

plinth/modules/help/help.py

@@ -20,7 +20,6 @@ Help module for Plinth.
 """
 
 import os
-from gettext import gettext as _
 from django.http import Http404
 from django.template.response import TemplateResponse
 from django.utils.translation import ugettext as _, ugettext_lazy

plinth/modules/openvpn/views.py

@@ -116,7 +116,7 @@ def _collect_setup_result(request):
     return_code = setup_process.poll()
 
     # Setup process is not complete yet
-    if return_code == None:
+    if return_code is None:
         return
 
     if not return_code:

plinth/modules/tor/views.py

@@ -108,7 +108,7 @@ def _collect_config_result(request):
     return_code = config_process.poll()
 
     # Config process is not complete yet
-    if return_code == None:
+    if return_code is None:
         return
 
     status = tor.get_status()

plinth/modules/users/__init__.py

@@ -67,5 +67,3 @@ def _diagnose_ldap_entry(search_item):
 
     return [_('Check LDAP entry "{search_item}"')
             .format(search_item=search_item), result]
-
-