diff --git a/rhodecode/controllers/changeset.py b/rhodecode/controllers/changeset.py
--- a/rhodecode/controllers/changeset.py
+++ b/rhodecode/controllers/changeset.py
@@ -1,7 +1,15 @@
-#!/usr/bin/env python
-# encoding: utf-8
-# changeset controller for pylons
-# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
+# -*- coding: utf-8 -*-
+"""
+    rhodecode.controllers.changeset
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    changeset controller for pylons
+    
+    :created_on: Apr 25, 2010
+    :author: marcink
+    :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>    
+    :license: GPLv3, see COPYING for more details.
+"""
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; version 2
@@ -16,24 +24,22 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 # MA  02110-1301, USA.
-"""
-Created on April 25, 2010
-changeset controller for pylons
-@author: marcink
-"""
+import logging
+import traceback
+
 from pylons import tmpl_context as c, url, request, response
 from pylons.i18n.translation import _
 from pylons.controllers.util import redirect
+
+import rhodecode.lib.helpers as h
 from rhodecode.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator
 from rhodecode.lib.base import BaseController, render
 from rhodecode.lib.utils import EmptyChangeset
-import rhodecode.lib.helpers as h
 from rhodecode.model.scm import ScmModel
+
 from vcs.exceptions import RepositoryError, ChangesetError
 from vcs.nodes import FileNode
 from vcs.utils import diffs as differ
-import logging
-import traceback
 
 log = logging.getLogger(__name__)
 
@@ -47,7 +53,6 @@ class ChangesetController(BaseController
 
     def index(self, revision):
         hg_model = ScmModel()
-        cut_off_limit = 1024 * 250
 
         def wrap_to_table(str):
 
@@ -82,7 +87,7 @@ class ChangesetController(BaseController
                     diff = wrap_to_table(_('binary file'))
                 else:
                     c.sum_added += node.size
-                    if c.sum_added < cut_off_limit:
+                    if c.sum_added < self.cut_off_limit:
                         f_udiff = differ.get_udiff(filenode_old, node)
                         diff = differ.DiffProcessor(f_udiff).as_html()
 
@@ -108,7 +113,7 @@ class ChangesetController(BaseController
                     diff = wrap_to_table(_('binary file'))
                 else:
 
-                    if c.sum_removed < cut_off_limit:
+                    if c.sum_removed < self.cut_off_limit:
                         f_udiff = differ.get_udiff(filenode_old, node)
                         diff = differ.DiffProcessor(f_udiff).as_html()
                         if diff:
@@ -151,7 +156,7 @@ class ChangesetController(BaseController
             for node in c.changeset.added:
                 filenode_old = FileNode(node.path, '')
                 if filenode_old.is_binary or node.is_binary:
-                    diff = _('binary file') +'\n'
+                    diff = _('binary file') + '\n'
                 else:
                     f_udiff = differ.get_udiff(filenode_old, node)
                     diff = differ.DiffProcessor(f_udiff).raw_diff()
@@ -173,15 +178,15 @@ class ChangesetController(BaseController
                 c.changes.append(('changed', node, diff, cs1, cs2))
 
         response.content_type = 'text/plain'
-        
+
         if method == 'download':
             response.content_disposition = 'attachment; filename=%s.patch' % revision
-            
+
         parent = True if len(c.changeset.parents) > 0 else False
         c.parent_tmpl = 'Parent  %s' % c.changeset.parents[0].raw_id if parent else ''
 
         c.diffs = ''
         for x in c.changes:
             c.diffs += x[2]
-        
+
         return render('changeset/raw_changeset.html')