From 7da07ff48bee36fabce6a6683eabd27003e32b8d Mon Sep 17 00:00:00 2001
From: "zed.zy" <zed.zy@antgroup.com>
Date: Tue, 15 Mar 2022 19:37:52 +0800
Subject: [PATCH] Improve the explanation about the behaviour of read_line

---
 library/std/src/io/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
index 6005270a75f..e53e1f49309 100644
--- a/library/std/src/io/mod.rs
+++ b/library/std/src/io/mod.rs
@@ -2110,7 +2110,7 @@ fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize> {
     }
 
     /// Read all bytes until a newline (the `0xA` byte) is reached, and append
-    /// them to the provided buffer.
+    /// them to the provided buffer (without clear buffer before appending to it).
     ///
     /// This function will read bytes from the underlying stream until the
     /// newline delimiter (the `0xA` byte) or EOF is found. Once found, all bytes