Auto merge of #5261 - matthiaskrgr:qmark, r=flip1995
Auto merge of #5261 - matthiaskrgr:qmark, r=flip1995

use question mark operator

changelog: none

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