Fixed tests after changing DataError to ValueError. Also whitespace cleanup.
Fixed tests after changing DataError to ValueError. Also whitespace cleanup.

Senseg/robotframework,Senseg/robotframework,userzimmermann/robotframework-python3,Senseg/robotframework,userzimmermann/robotframework-python3,Senseg/robotframework,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,Senseg/robotframework,userzimmermann/robotframework-python3