linting errors related to ambiguous variable names

[Thomas Gilgenast]

recently, pipelines are failing during linting with

E741 ambiguous variable name 'l'

an example is here: https://bitbucket.org/creminslab/lib5c/addon/pipelines/home#!/results/97

our guess is that flake8 defaults changed in a newer version, which is why linting passes locally

[Thomas Gilgenast]

for simplicity, we will choose to handle this by adding an exception for E741at the setup.cfg level

[Thomas Gilgenast]

fixes #81

→ <<cset 256b3ca668c3>>