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-rw-r--r--spec/ruby/library/csv/generate_spec.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/ruby/library/csv/generate_spec.rb b/spec/ruby/library/csv/generate_spec.rb
index 0a1e3d9604..b45e2eb95b 100644
--- a/spec/ruby/library/csv/generate_spec.rb
+++ b/spec/ruby/library/csv/generate_spec.rb
@@ -21,7 +21,7 @@ describe "CSV.generate" do
end
it "appends and returns the argument itself" do
- str = ""
+ str = +""
csv_str = CSV.generate(str) do |csv|
csv.add_row [1, 2, 3]
csv << [4, 5, 6]