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-rw-r--r--spec/ruby/core/argf/shared/getc.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/ruby/core/argf/shared/getc.rb b/spec/ruby/core/argf/shared/getc.rb
index 8be39c60b6..d63372d9d7 100644
--- a/spec/ruby/core/argf/shared/getc.rb
+++ b/spec/ruby/core/argf/shared/getc.rb
@@ -9,7 +9,7 @@ describe :argf_getc, shared: true do
it "reads each char of files" do
argf [@file1, @file2] do
- chars = ""
+ chars = +""
@chars.size.times { chars << @argf.send(@method) }
chars.should == @chars
end