From b5ca329616e0614822c9767264c63e7c0a30a720 Mon Sep 17 00:00:00 2001
From: Ivan Tham <pickfire@riseup.net>
Date: Tue, 16 Mar 2021 23:15:44 +0800
Subject: [PATCH] Show details in cfg version unstable book

---
 src/doc/unstable-book/src/language-features/cfg-version.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/doc/unstable-book/src/language-features/cfg-version.md b/src/doc/unstable-book/src/language-features/cfg-version.md
index 2b1e50835b7..a6ec42cecba 100644
--- a/src/doc/unstable-book/src/language-features/cfg-version.md
+++ b/src/doc/unstable-book/src/language-features/cfg-version.md
@@ -7,19 +7,20 @@ The tracking issue for this feature is: [#64796]
 ------------------------
 
 The `cfg_version` feature makes it possible to execute different code
-depending on the compiler version.
+depending on the compiler version. It will return true if the compiler
+version is greater than or equal to the specified version.
 
 ## Examples
 
 ```rust
 #![feature(cfg_version)]
 
-#[cfg(version("1.42"))]
+#[cfg(version("1.42"))] // 1.42 and above
 fn a() {
     // ...
 }
 
-#[cfg(not(version("1.42")))]
+#[cfg(not(version("1.42")))] // 1.41 and below
 fn a() {
     // ...
 }