From b2d0e0ae98afd002b047dda45defd21da8219004 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rin=20Cat=20=28=E9=88=B4=E7=8C=AB=29?= <rincat@rincat.dev>
Date: Fri, 14 Feb 2025 13:02:25 -0500
Subject: [PATCH] Remove unnecessary mut
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Signed-off-by: Rin Cat (鈴猫) <rincat@rincat.dev>
---
 src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index c03c735..1830c75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -129,7 +129,7 @@ impl Challenger {
         self.difficulty = (difficulty as f64 * DIFFICULTY_SCALE) as u32;
     }
 
-    pub fn issue_challenge(&mut self) -> String {
+    pub fn issue_challenge(&self) -> String {
         let (_x, y, p) = self.algorithm.create(self.difficulty);
 
         let puzzle = Puzzle {