Git Patch - RFC 2047 Encoded-Word Subject and Author

From 61490f2b8ca2fcea948781ef5546ad90f5baa2ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ana=C3=AFs_Lef=C3=A8vre?= <anais.lefevre@example.invalid>
Date: Tue, 10 Mar 2026 13:22:41 +0100
Subject: [PATCH] =?UTF-8?q?fix=28rounding=29=3A_d=C3=A9tecter_les_?=
 =?UTF-8?q?arrondis_n=C3=A9gatifs?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Les montants négatifs étaient arrondis vers zéro.

The commit body is UTF-8 8-bit while the headers are RFC 2047 encoded words.
---
 internal/ledger/apply.go | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/internal/ledger/apply.go b/internal/ledger/apply.go
index 95f499d..ce501c6 100644
--- a/internal/ledger/apply.go
+++ b/internal/ledger/apply.go
@@ -1,14 +1,21 @@
 package ledger
 
-import "errors"
+import (
+	"errors"
+	"fmt"
+)
 
 // ErrShortBalance is returned when a posting would drive the balance negative.
 var ErrShortBalance = errors.New("ledger: insufficient balance")
 
 // Apply posts one delta against the running balance and returns the new total.
+// A zero delta is a no-op and never reports an error.
 func Apply(balance, delta int64) (int64, error) {
+	if delta == 0 {
+		return balance, nil
+	}
 	if balance+delta < 0 {
-		return balance, ErrShortBalance
+		return balance, fmt.Errorf("%w: balance %d, requested %d", ErrShortBalance, balance, delta)
 	}
 	return balance + delta, nil
 }
-- 
2.43.0