Auto merge of #10244 - joshtriplett:tyop, r=ehuss
Auto merge of #10244 - joshtriplett:tyop, r=ehuss

Fix typo: substract -> subtract

nipunn1313/cargo,nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,rustyhorde/cargo,rust-lang/cargo,eminence/cargo,nipunn1313/cargo,eminence/cargo,eminence/cargo,nipunn1313/cargo,rustyhorde/cargo,rust-lang/cargo,rust-lang/cargo