Docs unit tests fail if an input argument has newlines

This docstring creates a unit test failure, because of the newlines in the second-to-last argument. Interesting, if state_handlers is the LAST argument, no error is raised

"""
    Args:
        - flow (Flow): the `Flow` to be run
        - task_runner_cls (TaskRunner, optional): The class used for running
            individual Tasks. Defaults to [TaskRunner](task_runner.html)
        - state_handlers (Iterable[Callable], optional): A list of state change handlers
            that will be called whenever the flow changes state, providing an
            opportunity to inspect or modify the new state. The handler
            will be passed the flow runner instance, the old (prior) state, and the new
            (current) state, with the following signature:

            ```
                state_handler(
                    flow_runner: FlowRunner,
                    old_state: State,
                    new_state: State) -> State
            ```

            If multiple functions are passed, then the `new_state` argument will be the
            result of the previous handler.
        - task_runner_state_handlers (Iterable[Callable], optional): A list of state change
            handlers that will be provided to the task_runner, and called whenever a task changes
            state.
"""

[jlowin]

I can’t express how happy I am that I just opened a bug report… for docs.

[cicdw]

Closing this as we will be migrating our documentation to new tooling that will solve this automatically.