From cef5e57eb59f0ef2633c298aa2c8a5b049b32d5c Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Thu, 26 Oct 2023 16:06:44 +0800
Subject: [PATCH] fixes #22867; fixes cstring modification example on Nim
 Manual (#22871)

fixes #22867
---
 doc/manual.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/manual.md b/doc/manual.md
index 8f419705ef..0e447fd123 100644
--- a/doc/manual.md
+++ b/doc/manual.md
@@ -1495,7 +1495,8 @@ it can be modified:
 
   ```nim
   var x = "123456"
-  var s: cstring = x
+  prepareMutation(x) # call `prepareMutation` before modifying the strings
+  var s: cstring = cstring(x)
   s[0] = 'u' # This is ok
   ```