logilab-common #6820061 typo in shellutils.py __slot__ -> __slots__ [validation pending]

logilab/common/shellutils.py has a typo. on DummyProgressBar you have a __slot__ attribute which was presumably intended to be __slots__.

prioritynormal
typebug
done in1.3.0
load left0.000
closed by#d34362c77bbe [shellutils] Typo slot -> slots
patch[shellutils] Typo slot -> slots [applied]