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-rw-r--r--actionpack/lib/action_dispatch/middleware/debug_exceptions.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index 077a83b112..5f5fdbc66a 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -23,7 +23,7 @@ module ActionDispatch
if clean_params.empty?
"None"
else
- PP.pp(clean_params, "".dup, 200)
+ PP.pp(clean_params, +"", 200)
end
end