Fixed #26558 -- Removed need for request context processor on admin login page.

django/contrib/admin/sites.py

@@ -361,6 +361,7 @@ class AdminSite(object):
             self.each_context(request),
             title=_('Log in'),
             app_path=request.get_full_path(),
+            username=request.user.get_username(),
         )
         if (REDIRECT_FIELD_NAME not in request.GET and
                 REDIRECT_FIELD_NAME not in request.POST):

django/contrib/admin/templates/admin/login.html

@@ -34,7 +34,7 @@
 
 {% if user.is_authenticated %}
 <p class="errornote">
-{% blocktrans with username=request.user.get_username trimmed %}
+{% blocktrans trimmed %}
     You are authenticated as {{ username }}, but are not authorized to
     access this page. Would you like to login to a different account?
 {% endblocktrans %}