Add failing test: columnize called with very long entries.

Bug reported on-list.

IPython/utils/tests/test_text.py

@@ -0,0 +1,30 @@
+# encoding: utf-8
+"""Tests for IPython.utils.text"""
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+import os
+
+import nose.tools as nt
+
+from nose import with_setup
+
+from IPython.testing import decorators as dec
+from IPython.utils import text
+
+#-----------------------------------------------------------------------------
+# Globals
+#-----------------------------------------------------------------------------
+
+def test_columnize():
+    """Test columnize with very long inputs"""
+    text.columnize(['a'*180, 'b'*180])