[ruby/csv] Fix a bug that strip: true removes newlines

https://github.com/ruby/csv/commit/5540d35a30

lib/csv/parser.rb

@@ -429,7 +429,7 @@ class CSV
         end
         @need_robust_parsing = true
       elsif @strip
-        strip_values = " \t\r\n\f\v"
+        strip_values = " \t\f\v"
         @escaped_strip = strip_values.encode(@encoding)
         if @quote_character
           @strip_value = Regexp.new("[#{strip_values}]+".encode(@encoding))

test/csv/parse/test_strip.rb

@@ -45,4 +45,34 @@ class TestCSVParseStrip < Test::Unit::TestCase
                                 strip: %Q{"},
                                 quote_char: nil))
   end
+
+  def test_do_not_strip_cr
+    assert_equal([
+                   ["a", "b "],
+                   ["a", "b "],
+                 ],
+                 CSV.parse(%Q{"a" ,"b " \r} +
+                           %Q{"a" ,"b " \r},
+                           strip: true))
+  end
+
+  def test_do_not_strip_lf
+    assert_equal([
+                   ["a", "b "],
+                   ["a", "b "],
+                 ],
+                 CSV.parse(%Q{"a" ,"b " \n} +
+                           %Q{"a" ,"b " \n},
+                           strip: true))
+  end
+
+  def test_do_not_strip_crlf
+    assert_equal([
+                   ["a", "b "],
+                   ["a", "b "],
+                 ],
+                 CSV.parse(%Q{"a" ,"b " \r\n} +
+                           %Q{"a" ,"b " \r\n},
+                           strip: true))
+  end
 end