PSOURCE CST_SHAPE/EXP_SHAPE
In documentation we say it is EXP_SHAPE by default https://croco-ocean.gitlabpages.inria.fr/croco_doc/tutos/tutos.12.rivers.html whereas in code it is CST_SHAPE for REGIONAL and general case (see https://gitlab.inria.fr/croco-ocean/croco/-/blob/master/OCEAN/analytical.F#L2089), it is EXP_SHAPE only for #RIVER test case
We need to fix documentation or code to be coherent.
Other question CST_SHAPE is describe as a constant shape but in generalized sigma it is not the case as layer thicknesses are not equal... perhaps change the name to avoid confusion ?