Clean up styling information.

IPython/frontend/qt/console/ipython_widget.py

@@ -38,7 +38,7 b' class IPythonWidget(FrontendWidget):'
 
     # A dark stylesheet: white text on a black background.
     dark_stylesheet = """
-        QPlainTextEdit { background-color: black; color: white }
+        QPlainTextEdit, QTextEdit { background-color: black; color: white }
         QFrame { border: 1px solid grey; }
         .error { color: red; }
         .in-prompt { color: lime; }

IPython/frontend/qt/console/rich_ipython_widget.py

@@ -15,17 +15,6 b' class RichIPythonWidget(IPythonWidget):'
     # Protected class variables.
     _svg_text_format_property = 1
 
-    # We need to override this because this class uses QTextEdit.
-    dark_stylesheet = """
-        QTextEdit { background-color: black; color: white }
-        QFrame { border: 1px solid grey; }
-        .error { color: red; }
-        .in-prompt { color: lime; }
-        .in-prompt-number { color: lime; font-weight: bold; }
-        .out-prompt { color: red; }
-        .out-prompt-number { color: red; font-weight: bold; }
-    """
-
     #---------------------------------------------------------------------------
     # 'object' interface
     #---------------------------------------------------------------------------