[MRG+1] BUG Fix the shrinkage implementation in NearestCentroid #9219
What does this implement/fix? Explain your changes.
Any other comments?
Maybe milestone can be changed back to 0.19?
@jnothman Thanks. Finished. I also checked the code in the document, user guide and examples, it seems that nothing need to be modified(though the result is sligtly changed). As is pointed out in the issue, in practice when n is large, the result is almost the same.