Configurations: document reorder_extern_crates settings
Configurations: document reorder_extern_crates settings

SingingTree/rustfmt,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,rust-lang/rustfmt,rust-lang/rustfmt,SingingTree/rustfmt,graydon/rust