Rollup merge of #33524 - briangreenery:briangreenery-fast-and-loose, r=steveklabnik
Rollup merge of #33524 - briangreenery:briangreenery-fast-and-loose, r=steveklabnik

doc: Fix tiny typo in vec-alloc.md

Change `fast an loose` to `fast and loose`.

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