From d76ed9e47e8209811914eb6e2e55c232e2795471 Mon Sep 17 00:00:00 2001
From: Boris Slobodin <boris.slobodin@shopify.com>
Date: Mon, 31 Jul 2017 11:10:59 -0700
Subject: fix typo in assert_changes error message

---
 activesupport/lib/active_support/testing/assertions.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/activesupport/lib/active_support/testing/assertions.rb b/activesupport/lib/active_support/testing/assertions.rb
index f6366bfd39..e2bc51ff7a 100644
--- a/activesupport/lib/active_support/testing/assertions.rb
+++ b/activesupport/lib/active_support/testing/assertions.rb
@@ -157,7 +157,7 @@ module ActiveSupport
         after = exp.call
 
         if to == UNTRACKED
-          error = "#{expression.inspect} didn't changed"
+          error = "#{expression.inspect} didn't change"
           error = "#{message}.\n#{error}" if message
           assert_not_equal before, after, error
         else
-- 
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