Improve "colour.XYZ_to_spectral_Meng2015" definition docstring.
@@ -62,8 +62,8 @@ def XYZ_to_spectral_Meng2015(
cmfs : XYZ_ColourMatchingFunctions
Standard observer colour matching functions.
interval : numeric, optional
- Wavelength :math:`\lambda_{i}` range interval. The smaller `interval`
- is the longer will be the computations.
+ Wavelength :math:`\lambda_{i}` range interval in nm. The smaller
+ `interval` is, the longer the computations will be.
tolerance : numeric, optional
Tolerance for termination. The lower `tolerance` is, the smoother
the recovered spectral power distribution will be.
