--- a/Plugins/VcsPlugins/vcsMercurial/HgDiffDialog.py	Sun Mar 24 13:52:12 2013 +0100
+++ b/Plugins/VcsPlugins/vcsMercurial/HgDiffDialog.py	Mon Mar 25 03:11:06 2013 +0100
@@ -7,6 +7,12 @@
 Module implementing a dialog to show the output of the hg diff command process.
 """
 
+from __future__ import unicode_literals    # __IGNORE_WARNING__
+try:
+    str = unicode
+except (NameError):
+    pass
+
 import os
 
 from PyQt4.QtCore import pyqtSlot, QProcess, QTimer, QFileInfo, Qt
@@ -33,7 +39,7 @@
         @param vcs reference to the vcs object
         @param parent parent widget (QWidget)
         """
-        super().__init__(parent)
+        super(HgDiffDialog, self).__init__(parent)
         self.setupUi(self)
         
         self.buttonBox.button(QDialogButtonBox.Save).setEnabled(False)
@@ -481,4 +487,4 @@
             self.intercept = False
             evt.accept()
             return
-        super().keyPressEvent(evt)
+        super(HgDiffDialog, self).keyPressEvent(evt)