Incoherent sign on C_k in the Kolmogorov-Smirnov statistical test documentation

[JulienRoussel77]

The formula for C_k presented here has a sign convention that is the opposite of the implementation in the function mapie.metrics.kolmogorov_smirnov_statistic : link

[BaptisteCalot]

I seems to be good and the code matches the documentation

1- Here is the code

2- Here is the doc

@LacombeLouis can you confirm my observation please ?

[BaptisteCalot]

I have changed the title of the issue as well as its description: the sign error into C_k (cumulative difference) comes from its use into the Kolmogorov-Smirnov statistical test, not from the cumulative difference metric