Fix the headers

beat/backend/python/message_handler.py

beat/backend/python/test/mocks.py

...backend/python/test/prefix/algorithms/autonomous/add/1.py

...ackend/python/test/prefix/algorithms/autonomous/add2/1.py

...ackend/python/test/prefix/algorithms/autonomous/add3/1.py

...ackend/python/test/prefix/algorithms/autonomous/echo/1.py

.../python/test/prefix/algorithms/autonomous/no_prepare/1.py

...ython/test/prefix/algorithms/autonomous/parametrized/1.py

...thon/test/prefix/algorithms/autonomous/prepare_crash/1.py

...ython/test/prefix/algorithms/autonomous/prepare_fail/1.py

...thon/test/prefix/algorithms/autonomous/process_crash/1.py

...python/test/prefix/algorithms/autonomous/setup_crash/1.py

.../python/test/prefix/algorithms/autonomous/setup_fail/1.py

...hon/test/prefix/algorithms/autonomous/valid_analysis/1.py

beat/backend/python/test/prefix/algorithms/legacy/add/1.py

beat/backend/python/test/prefix/algorithms/legacy/add2/1.py

beat/backend/python/test/prefix/algorithms/legacy/echo/1.py

...ackend/python/test/prefix/algorithms/legacy/no_class/1.py

...ackend/python/test/prefix/algorithms/legacy/no_setup/1.py

...nd/python/test/prefix/algorithms/legacy/parametrized/1.py