Fix loading of fixtures when the column type is a postgres array of strings.

 - A string in an array of strings that has a quote char (') needs to have that quote char escaped if the array is getting wrapped in quote chars.

activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb

@@ -32,7 +32,7 @@ def quote(value, column = nil) #:nodoc:
             when 'point' then super(PostgreSQLColumn.point_to_string(value))
             else
               if column.array
-                "'#{PostgreSQLColumn.array_to_string(value, column, self)}'"
+                "'#{PostgreSQLColumn.array_to_string(value, column, self).gsub(/'/, "''")}'"
               else
                 super
               end

activerecord/test/cases/adapters/postgresql/array_test.rb

@@ -81,6 +81,12 @@ def test_contains_nils
     assert_cycle(['1',nil,nil])
   end
 
+  def test_insert_fixture
+    tag_values = ["val1", "val2", "val3_with_'_multiple_quote_'_chars"]
+    @connection.insert_fixture({"tags" => tag_values}, "pg_arrays" )
+    assert_equal(PgArray.last.tags, tag_values)
+  end
+
   private
   def assert_cycle array
     # test creation