Auto merge of #4199 - flip1995:implicit_return_docs, r=flip1995
Auto merge of #4199 - flip1995:implicit_return_docs, r=flip1995

Fix implicit_return docs

Resolves #4197

changelog: none

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