Auto merge of #29690 - tbu-:pr_doc_env_home_dir, r=Manishearth
Auto merge of #29690 - tbu-:pr_doc_env_home_dir, r=Manishearth

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