docs(reader): Document ReadUntil

Author: epage

src/reader.rs

@@ -206,6 +206,7 @@ impl NBReader {
     }
 }
 
+/// See [`NBReader::read_until`]
 pub enum ReadUntil {
     String(String),
     Regex(Regex),

src/session.rs

@@ -5,8 +5,8 @@ use crate::process::PtyProcess;
 use crate::reader::{NBReader, Regex};
 pub use crate::reader::{Options, ReadUntil};
 use std::fs::File;
-use std::io::prelude::*;
 use std::io::LineWriter;
+use std::io::prelude::*;
 use std::ops::{Deref, DerefMut};
 use std::process::Command;
 use tempfile;