Correct error messages in Python test cases, remove redirection of output to /dev/null
Correct error messages in Python test cases, remove redirection of output to /dev/null

biotool-paper/biotool,lonsbio/biotool,biotool-paper/biotool,bjpop/biotool,bjpop/biotool,lonsbio/biotool,bjpop/biotool,biotool-paper/biotool,bjpop/biotool,biotool-paper/biotool,drpowell/biotool,lonsbio/biotool,biotool-paper/biotool,bjpop/biotool,biotool-paper/biotool,bionitio-team/bionitio,bjpop/biotool,drpowell/biotool,drpowell/biotool,biotool-paper/biotool,biotool-paper/biotool,drpowell/biotool,drpowell/biotool,bjpop/biotool,bjpop/biotool,bjpop/biotool,biotool-paper/biotool,drpowell/biotool,drpowell/biotool,bjpop/biotool,drpowell/biotool,drpowell/biotool,lonsbio/biotool,biotool-paper/biotool,drpowell/biotool