From 73223394e6dbdc91d19cf26d8180aeb5322a221d Mon Sep 17 00:00:00 2001
From: chen-liang-CN <chen.liang.11cn@gmail.com>
Date: Tue, 17 Dec 2024 16:28:18 +0000
Subject: [PATCH] update error message for missing '0x' prefix (#6869)

---
 crates/cairo-lang-utils/src/bigint.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crates/cairo-lang-utils/src/bigint.rs b/crates/cairo-lang-utils/src/bigint.rs
index f53ec18ae44..559c5267613 100644
--- a/crates/cairo-lang-utils/src/bigint.rs
+++ b/crates/cairo-lang-utils/src/bigint.rs
@@ -31,7 +31,9 @@ where
     match s.strip_prefix("0x") {
         Some(num_no_prefix) => BigUint::from_str_radix(num_no_prefix, 16)
             .map_err(|error| serde::de::Error::custom(format!("{error}"))),
-        None => Err(serde::de::Error::custom(format!("{s} does not start with `0x` is missing."))),
+        None => Err(serde::de::Error::custom(format!(
+            "{s} does not start with `0x`, which is missing."
+        ))),
     }
 }