Fix number_to_precision rounding error [rails#2071 state:resolved]

Signed-off-by: Pratik Naik <[email protected]>

Author: wmoxam

actionpack/lib/action_view/helpers/number_helper.rb

@@ -215,7 +215,7 @@ def number_with_precision(number, *args)
         delimiter ||= (options[:delimiter] || defaults[:delimiter])
 
         begin
-          rounded_number = (Float(number) * (10 ** precision)).round.to_f / 10 ** precision
+          rounded_number = BigDecimal.new((Float(number) * (10 ** precision)).to_s).round.to_f / 10 ** precision
           number_with_delimiter("%01.#{precision}f" % rounded_number,
             :separator => separator,
             :delimiter => delimiter)

actionpack/test/template/number_helper_test.rb

@@ -88,6 +88,7 @@ def test_number_with_precision
     assert_equal("111.00", number_with_precision(111, :precision => 2))
     assert_equal("111.235", number_with_precision("111.2346"))
     assert_equal("31.83", number_with_precision("31.825", :precision => 2))
+    assert_equal("3268", number_with_precision((32.675 * 100.00), :precision => 0))
     assert_equal("112", number_with_precision(111.50, :precision => 0))
     assert_equal("1234567892", number_with_precision(1234567891.50, :precision => 0))