def __init__(self, args, msg, cmd_err=None):
        msg = (args, msg) % 'command %s %s'
        if cmd_err:
            indented_err = '  ' + '\n  '.join(cmd_err.splitlines())
            msg = msg + '\nstderr:\n' + indented_err
        ProcError.__init__(self, msg)
        # Note: don't call this self.args
        # The builtin Exception class uses self.args for its own data
        self.cmd = args
        self.stderr = cmd_err
dataset/ETHPy150Open facebookarchive/git-review/src/gitreview/proc.py/CmdFailedError.__init__/swapped operands of `%`