Improve message for rustc --explain E0507
Improve message for rustc --explain E0507

E0507 can occur when you try to move out of a member of a mutably
borrowed struct, in which case `mem::replace` can help. Mentioning that
here hopefully saves future users a trip to Google.

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