Error for calltip with empty signature

Description

What steps will reproduce the problem?

import os

os.getcwd( -> triggers calltip but an error raises

Traceback

  File "C:\Users\Daniel\Anaconda3\envs\spyder4\lib\site-packages\qtconsole\base_frontend_mixin.py", line 138, in _dispatch
    handler(msg)
  File "C:\Users\Daniel\Desktop\Spyder\spyder\spyder\plugins\ipythonconsole\widgets\help.py", line 141, in _handle_inspect_reply
    documentation = self.get_documentation(content)
  File "C:\Users\Daniel\Desktop\Spyder\spyder\spyder\plugins\ipythonconsole\widgets\help.py", line 46, in get_documentation
    documentation = text.split(signature)
ValueError: empty separator

Versions

• Spyder version: 4.0.0.dev0 eb70e6b6d
• Python version: 3.7.3
• Qt version: 5.9.6
• PyQt5 version: 5.9.2
• Operating System: Windows 8.1

Dependencies

pygments >=2.0     :  2.4.0 (OK)
qdarkstyle >=2.6.4 :  2.6.8 (OK)
sphinx >=0.6.6     :  2.0.1 (OK)
pyls >=0.19.0;<0.25:  0.24.0 (OK)
nbconvert >=4.0    :  5.5.0 (OK)
pandas >=0.13.1    :  0.24.2 (OK)
numpy >=1.7        :  1.16.3 (OK)
sympy >=0.7.3      :  1.4 (OK)
cython >=0.21      :  0.29.7 (OK)
qtconsole >=4.2.0  :  4.5.1 (OK)
IPython >=4.0      :  7.5.0 (OK)
matplotlib >=2.0.0 :  3.0.3 (OK)
pylint >=0.25      :  2.3.1 (OK)

[goanpeca]

Thanks!

[dalthviz]

@goanpeca no worries, actually I think the error is part of the changes I made to show documentation in the calltips of the IPython Console, so I will work on it 👍