ipython/ipython — pull request #1175 by bfroehle (2011-12-18 20:26:51+00:00)
Title: core.completer: Clean up excessive and unused code.

- `mark_dirs` is only called from one location and it is more simply
expressed as a one-liner using the ternary operator.
- `single_dir_expand` is not called from anywhere in IPython.