Rollup merge of #33745 - postmodern:patch-1, r=steveklabnik
Rollup merge of #33745 - postmodern:patch-1, r=steveklabnik

Clarify wording in `transmute` example

* Change "four eights" to "four u8s"
* Change "a 32" to "a u32"

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