common option conversion parameters

[anacreon]

I get an error message when calling the "options communes" in the conversion tool:

Spoiler:

calibre, version 3.9.0
ERREUR : Exception non gérée: <b>AttributeError</b>:'OptionRecommendation' object has no attribute 'expandtabs'

calibre 3.9 Portable embedded-python: True is64bit: False
Windows-10-10.0.15063-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.15063')
Python 2.7.12+
Windows: ('10', '10.0.15063', 'SP0', u'Multiprocessor Free')
Interface language: fr
Successfully initialized third party plugins: DeDRM (6, 1, 0) && Kindle and Mobipocket DeDRM (0, 4, 5) && EpubSplit (2, 2, 1) && Quality Check (1, 9, 11) && Open With (1, 5, 10) && EpubMerge (2, 1, 1) && Kobo Utilities (2, 6, 0) && Modify ePub (1, 3, 13) && Fichier de sortie KePub (2, 3, 3) && Obok DeDRM (3, 0, 7) && Count Pages (1, 8, 0) && KoboTouchExtended (2, 8, 2) && KePub Output (2, 7, 1)
Traceback (most recent call last):
File "site-packages\calibre\gui2\preferences\main.py", line 308, in show_plugin
File "site-packages\calibre\gui2\preferences\conversion.py", line 98, in genesis
File "site-packages\calibre\gui2\preferences\conversion.py", line 95, in widget_factory
File "site-packages\calibre\gui2\convert\look_and_feel.py", line 55, in __init__
File "site-packages\calibre\gui2\convert\__init__.py", line 94, in initialize_options
File "site-packages\calibre\gui2\convert\__init__.py", line 268, in setup_help
File "site-packages\calibre\gui2\convert\__init__.py", line 272, in setup_widget_help
File "textwrap.py", line 325, in wrap
File "textwrap.py", line 154, in _munge_whitespace
AttributeError: 'OptionRecommendation' object has no attribute 'expandtabs'

and I don't know why. Calling in and out parameters work fine.
I didn't see a post about this in the first few pages of this thread, but maybe I should have looked elsewhere.

[BetterRed]

@anacreon - known problem - will be fixed in next release

BR