Handle quoting multibyte strings with newlines.

[#999 state:committed]

activerecord/lib/active_record/base.rb

@@ -2085,7 +2085,7 @@ def expand_range_bind_variables(bind_vars) #:nodoc:
         end
 
         def quote_bound_value(value) #:nodoc:
-          if value.respond_to?(:map) && !value.is_a?(String)
+          if value.respond_to?(:map) && !value.is_a?(String) && !value.is_a?(ActiveSupport::Multibyte::Chars)
             if value.respond_to?(:empty?) && value.empty?
               connection.quote(nil)
             else

activerecord/test/cases/finder_test.rb

@@ -387,6 +387,14 @@ def test_bind_string
     assert_equal ActiveRecord::Base.connection.quote(''), bind('?', '')
   end
 
+  def test_bind_string_with_nl
+    assert_equal ActiveRecord::Base.connection.quote("a\nb"), bind('?', "a\nb")
+  end
+
+  def test_bind_mb_string_with_nl
+    assert_equal ActiveRecord::Base.connection.quote("a\nb"), bind('?', "a\nb".chars)
+  end
+
   def test_bind_record
     o = Struct.new(:quoted_id).new(1)
     assert_equal '1', bind('?', o)