Auto merge of #4952 - rust-lang:matklad-patch-1, r=alexcrichton
Auto merge of #4952 - rust-lang:matklad-patch-1, r=alexcrichton

Fix link in a doc comment

tsurai/cargo,tshepang/cargo,eminence/cargo,nipunn1313/cargo,rustyhorde/cargo,tsurai/cargo,rust-lang/cargo,vojtechkral/cargo,tsurai/cargo,nipunn1313/cargo,tshepang/cargo,rust-lang/cargo,vojtechkral/cargo,rustyhorde/cargo,eminence/cargo,vojtechkral/cargo,tshepang/cargo,rustyhorde/cargo,rustyhorde/cargo,tsurai/cargo,nipunn1313/cargo,rust-lang/cargo,eminence/cargo,tsurai/cargo,rust-lang/cargo,vojtechkral/cargo,tshepang/cargo,eminence/cargo,nipunn1313/cargo