From a76559e04a52ad85993dfe276b91591ad54c4b76 Mon Sep 17 00:00:00 2001
From: 5ouma <101255979+5ouma@users.noreply.github.com>
Date: Fri, 1 Sep 2023 00:06:32 +0900
Subject: [PATCH] [update] Doc to use `errPrefix`

Description to change it and what it is.
---
 site/content/user_guide.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/site/content/user_guide.md b/site/content/user_guide.md
index 56e8e44a..03972bb9 100644
--- a/site/content/user_guide.md
+++ b/site/content/user_guide.md
@@ -596,6 +596,12 @@ Running an application with the '--version' flag will print the version to stdou
 the version template. The template can be customized using the
 `cmd.SetVersionTemplate(s string)` function.
 
+## Error Message Prefix
+
+Cobra prints an error message when being returned a non-nil error value.
+The default error message is `Error: error contents`.
+The Prefix, `Error:` can be customized using the `cmd.SetErrPrefix(s string)` function.
+
 ## PreRun and PostRun Hooks
 
 It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherited by children if they do not declare their own.  These functions are run in the following order: