def concatenate_raws(raws, preload=None, events_list=None):
    if events_list is not None:
        if len(events_list) != len(raws):
            raise ValueError('`raws` and `event_list` are required '
                             'to be of the same length')
        first, last = zip(*[(r.first_samp, r.last_samp) for r in raws])
        events = concatenate_events(events_list, first, last)
    raws[0].append(raws[1:], preload)

    if events_list is None:
        return raws[0]
    else:
        return raws[0], events
Verify the successful file creation and verify the request made
dataset/ETHPy150Open mne-tools/mne-python/mne/io/base.py/concatenate_raws--crossover with--dataset/ETHPy150Open mitodl/orcoursetrion/orcoursetrion/tests/test_github.py/TestGithub.test_add_repo_file_bad_status