Refactor if_chain
Refactor if_chain

Co-authored-by: Philipp Krones <aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d@philkrones.com>

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