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-rw-r--r--spec/ruby/library/stringio/readlines_spec.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/ruby/library/stringio/readlines_spec.rb b/spec/ruby/library/stringio/readlines_spec.rb
index c471d0fd73..ed7cc22b3d 100644
--- a/spec/ruby/library/stringio/readlines_spec.rb
+++ b/spec/ruby/library/stringio/readlines_spec.rb
@@ -83,7 +83,7 @@ end
describe "StringIO#readlines when in write-only mode" do
it "raises an IOError" do
- io = StringIO.new("xyz", "w")
+ io = StringIO.new(+"xyz", "w")
-> { io.readlines }.should raise_error(IOError)
io = StringIO.new("xyz")