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require 'test/unit'
class String
def sentences
gsub(/\n|\r/, ' ').split(/\.\s*/)
end
end
def test_sentences
assert_equal(["a", "b", "c d", "e f g"], "a. b. c d. e f g.".sentences)
test_text = %q{Hello. This is a test
of sentence separation. This is the end
of the test.}
assert_equal("This is the end of the test", test_text.sentences[2])
end
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