Rollup merge of #34097 - arbitrary-cat:master, r=steveklabnik
Rollup merge of #34097 - arbitrary-cat:master, r=steveklabnik

Revise wording in Rc documentation.

The term "thread-local" has a widely accepted meaning which is not
the meaning it's used for here.

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