Make "help()" work.

IPython/frontend/prefilterfrontend.py

@@ -72,6 +72,8 b' class PrefilterFrontEnd(LineFrontEndBase):'
         self.shell.output_trap = SyncOutputTrap(write_out=self.write,
                                                 write_err=self.write)
 
+        import pydoc
+        pydoc.help.output = self.shell.output_trap.out
 
     
     def prefilter_input(self, input_string):
@@ -114,7 +116,7 b' class PrefilterFrontEnd(LineFrontEndBase):'
         self.__old_stderr= sys.stderr
         sys.stdout = Term.cout
         sys.stderr = Term.cerr
-        # FIXME: I still need to provide the writelines method
+
 
     def release_output(self):
         """ Release all the different captures we have made,

IPython/frontend/wx/wx_frontend.py

@@ -181,6 +181,7 b' class WxController(PrefilterFrontEnd, ConsoleWidget):'
             widget handle them, and put our logic afterward.
         """
         current_line_number = self.GetCurrentLine()
+        # Calltips
         if event.KeyCode == ord('('):
             event.Skip()
             self.do_calltip()
@@ -212,6 +213,7 b' class WxController(PrefilterFrontEnd, ConsoleWidget):'
                 new_buffer = self.get_history_next()
                 if new_buffer is not None:
                     self.replace_current_edit_buffer(new_buffer)
+            # Tab-completion
             elif event.KeyCode == ord('\t'):
                 last_line = self.get_current_edit_buffer().split('\n')[-1]
                 if not re.match(r'^\s*$', last_line):