Minor cleanup related to tab widths.

IPython/frontend/qt/console/console_widget.py

@@ -30,7 +30,7 b' class ConsoleWidget(QtGui.QPlainTextEdit):'
     override_shortcuts = False
 
     # The number of spaces to show for a tab character.
-    tab_width = 4
+    tab_width = 8
 
     # Protected class variables.
     _ctrl_down_remap = { QtCore.Qt.Key_B : QtCore.Qt.Key_Left,

IPython/frontend/qt/console/frontend_widget.py

@@ -64,6 +64,9 b' class FrontendWidget(HistoryConsoleWidget):'
     """ A Qt frontend for a generic Python kernel.
     """
 
+    # ConsoleWidget interface.
+    tab_width = 4
+    
     # Emitted when an 'execute_reply' is received from the kernel.
     executed = QtCore.pyqtSignal(object)
 
@@ -139,7 +142,8 b' class FrontendWidget(HistoryConsoleWidget):'
             if self._get_prompt_cursor().blockNumber() != \
                     self._get_end_cursor().blockNumber():
                 spaces = self._input_splitter.indent_spaces
-                self.appendPlainText('\t' * (spaces / 4) + ' ' * (spaces % 4))
+                self.appendPlainText('\t' * (spaces / self.tab_width))
+                self.appendPlainText(' ' * (spaces % self.tab_width))
 
     def _prompt_finished_hook(self):
         """ Called immediately after a prompt is finished, i.e. when some input