When submitting textareas, browsers sometimes include carriage returns (\r) instead of just line feeds (\n) at the end of each line. I don't know when this happens, and most of the time it doesn't matter.

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Read more Show archive.org snapshot

In cases where it does matter, use the attached trait Show archive.org snapshot to remove carriage returns from one or more attributes like this:

class Note
  does 'strip_carriage_returns', :prose, :code
end

Here is the test that goes with it:

describe Note do

  describe 'before_validation' do
    it_should_run_callbacks(:strip_carriage_returns)
  end

  describe '#strip_carriage_returns' do

    it 'should strip carriage returns from any pasted code and prose' do
      article = Note.new(:prose => "foo\n\rbar", :code => "baz\n\rbam")
      article.should_receive(:prose=).with("foo\nbar")
      article.should_receive(:code=).with("baz\nbam")
      article.send(:strip_carriage_returns)
    end

  end

end