From 6484a1a95eb50ecf1dc186088d3359ec047a9dde Mon Sep 17 00:00:00 2001
From: Jean-Paul Calderone <exarkun@twistedmatrix.com>
Date: Tue, 10 Mar 2020 11:39:17 -0400
Subject: [PATCH] Correct the exception message

---
 src/_zkapauthorizer/_storage_server.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/_zkapauthorizer/_storage_server.py b/src/_zkapauthorizer/_storage_server.py
index d7f4835..ddefca3 100644
--- a/src/_zkapauthorizer/_storage_server.py
+++ b/src/_zkapauthorizer/_storage_server.py
@@ -517,7 +517,8 @@ def get_storage_index_share_size(sharepath):
 
     if len(header) != calcsize(fmt):
         raise ValueError(
-            "Tried to read 4 bytes of share data length from share, got {!r} instead.".format(
+            "Tried to read {} bytes of share file header, got {!r} instead.".format(
+                calcsize(fmt),
                 header,
             ),
         )
-- 
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