[commitgraph] Rearrange some `use` statements.
//! Operations on a single commit-graph file.
-use filebuffer::FileBuffer;
-use git_object::SHA1_SIZE;
-use std::ops::Range;
-use std::path::PathBuf;
-
mod access;
pub mod commit;
mod init;
pub use commit::Commit;
+use filebuffer::FileBuffer;
+use git_object::SHA1_SIZE;
pub use init::Error;
use std::fmt::{Display, Formatter};
+use std::ops::Range;
+use std::path::PathBuf;
const COMMIT_DATA_ENTRY_SIZE: usize = SHA1_SIZE + 16;
const FAN_LEN: usize = 256;
