--- a/Helpviewer/HelpTocWidget.py	Fri Nov 01 15:48:48 2013 +0100
+++ b/Helpviewer/HelpTocWidget.py	Sun Nov 03 15:58:22 2013 +0100
@@ -103,7 +103,7 @@
                event.button() == Qt.LeftButton:
                 self.itemClicked(self.__tocWidget.currentIndex())
             elif self.__tocWidget.indexAt(event.pos()).isValid() and \
-                 event.button() == Qt.MidButton:
+                    event.button() == Qt.MidButton:
                 model = self.__tocWidget.model()
                 itm = model.contentItemAt(self.__tocWidget.currentIndex())
                 self.__mw.newTab(itm.url())