PR: Attribute is listed twice in the docstring for IES TM-27-14's "Element_Specification_IESTM2714" class.
PR: Attribute is listed twice in the docstring for IES TM-27-14's "Element_Specification_IESTM2714" class.

Fix attribute listed twice in the docstring for IES TM-27-14's "Element_Specification_IESTM2714" class.
colour-science/colour