Reuse Box::try_new_*_in() in Box::new_*_in()
Reuse Box::try_new_*_in() in Box::new_*_in()

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