Christoph Büscher afe95a7738
[Docs] Add rank_eval size parameter k (#29218)
The rank_eval documentation was missing an explanation of the parameter
`k` that controls the number of top hits that are used in the ranking evaluation.

Closes #29205
2018-03-23 18:04:32 +01:00
..
2017-12-14 17:47:53 +01:00