@staticmethod
def instrument_help_block_message():
    """Assemble a block of relevant help text to be returned with an invalid request."""
    message = (
        'You must supply either a instrument id (like "/instrumentinfo/<instrument_id>")'
        )
    message += (
        ' or search for one using the form "/instrumentinfo/search/<search_term_1>+<search_term_2>"'
        )
    return message
