Cannot type left parenthesis in ipdb when automatic Help is turned on

[lxkain]

Description

What steps will reproduce the problem?

1. turn on help in ipython when left parens is typed
2. type "len("

What is the expected output? What do you see instead?
the ( does not appear. If the preference is unchecked, it works.

Please provide any additional information below

Version and main components

• Spyder Version: 3.0.0
• Python Version: 3.4.5
• Qt Versions: 4.8.7, PyQt4 (API v2) 4.11.4 on Darwin

Dependencies

pyflakes >=0.6.0 :  1.3.0 (OK)
pep8 >=0.6       :  1.7.0 (OK)
pygments >=2.0   :  2.1.3 (OK)
qtconsole >=4.2.0:  4.2.1 (OK)
nbconvert >=4.0  :  4.2.0 (OK)
pandas >=0.13.1  :  0.18.1 (OK)
numpy >=1.7      :  1.11.1 (OK)
sphinx >=0.6.6   :  1.4.6 (OK)
rope >=0.9.4     :  0.9.4-1 (OK)
jedi >=0.8.1     :  0.9.0 (OK)
psutil >=0.3     :  4.3.1 (OK)
matplotlib >=1.0 :  1.5.1 (OK)
sympy >=0.7.3    :  1.0 (OK)
pylint >=0.25    :  1.6.4 (OK)