Rollup merge of #39106 - istankovic:patch-2, r=GuillaumeGomez
Rollup merge of #39106 - istankovic:patch-2, r=GuillaumeGomez

libcollections: btree/set: fix a typo

graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust