Fix Spacing for DagBag.dagbag_report()'s Output

[mtsadler-branch]

The whitespace before {table} is throwing off the headers when printing DagBag.dagbag_report()

[mtsadler-branch]

I dont think these failures are related to the small change I made:

FAILED tests/jobs/test_triggerer_job.py::test_trigger_logging_sensitive_info - AssertionError: assert 'test_dag/test_run/sensitive_arg_task/-1/1 (ID 1) 
    """
    Checks that when a trigger fires, it doesn't log any sensitive
    information from arguments
    """

and

FAILED tests/providers/amazon/aws/operators/test_sqs.py::TestSqsPublishOperator::test_execute_success - botocore.exceptions.ClientError: An error occurred (400) when calling the SendMessage operation: <ErrorResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/"><Error><Type>Sender</Type><Code>AWS.SimpleQueueService.NonExistentQueue</Code><Message>The specified queue does not exist for this wsdl version.</Message><Detail/></Error><RequestId>86uWM0Jl6aJc4ryo8UcAN5fOLZTgL4oFScWcXOqVpCfP0HUgezA7</RequestId></ErrorResponse>