Be consistent with blank lines in USAGE
Be consistent with blank lines in USAGE

Most flags have a blank line between them, but some did not. Now they
all do.

catdesk/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,jdub/rust-bindgen,catdesk/rust-bindgen,catdesk/rust-bindgen,jdub/rust-bindgen,rust-lang/rust-bindgen,jdub/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,jdub/rust-bindgen,rust-lang/rust-bindgen,catdesk/rust-bindgen,rust-lang/rust-bindgen