From e0664662b49c1ed3e99391c51132ddf01cd87c79 Mon Sep 17 00:00:00 2001
From: Seiichi Uchida <seuchida@gmail.com>
Date: Thu, 23 May 2019 09:43:43 +0900
Subject: [PATCH] Update the documentation of ignore (#3580)

---
 Configurations.md | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Configurations.md b/Configurations.md
index dc91a3d255a7..3737b1c9a4e0 100644
--- a/Configurations.md
+++ b/Configurations.md
@@ -2325,7 +2325,8 @@ Copyright 2018 The Rust Project Developers.`, etc.:
 
 ## `ignore`
 
-Skip formatting the specified files and directories.
+Skip formatting files and directories that match the specified pattern.
+The pattern format is the same as [.gitignore](https://git-scm.com/docs/gitignore#_pattern_format).
 
 - **Default value**: format every file
 - **Possible values**: See an example below
@@ -2350,6 +2351,12 @@ ignore = [
 ]
 ```
 
+If you want to ignore every file under the directory where you put your rustfmt.toml:
+
+```toml
+ignore = ["/"]
+```
+
 ## `edition`
 
 Specifies which edition is used by the parser.