[PATCH] StringIO.puts shouldn't append \n if it's already there
---------------------------------------------------------------

                 Key: JRUBY-1248
                 URL: http://jira.codehaus.org/browse/JRUBY-1248
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules
         Environment: rev4066
            Reporter: Dmitry Verkhovsky
         Attachments: patch_r4066_3.txt

test.rb:

require 'stringio'

io = StringIO.new
io.puts("asd\n")
p io.string


>ruby tt.rb 
"asd\n"

>jruby tt.rb 
"asd\n\n"
         ^^^^ SHOULD BE ONLY ONE \n


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