Suppress `warning: BigDecimal.new is deprecated`

`BigDecimal.new` has been deprecated in BigDecimal 1.3.3
 which will be a default for Ruby 2.5.

Refer
https://github.com/ruby/bigdecimal/commit/533737338db915b00dc7168c3602e4b462b23503

* This commit has been made as follows:

```
cd rails
git grep -l BigDecimal.new | grep -v guides/source/5_0_release_notes.md | grep -v activesupport/test/xml_mini_test.rb | xargs sed -i -e "s/BigDecimal.new/BigDecimal/g"
```
- `activesupport/test/xml_mini_test.rb`
Editmanually to remove `.new` and `::`

- guides/source/5_0_release_notes.md
This is a Rails 5.0 release notes.

2 files changed, 7 insertions, 7 deletions

diff --git a/actionview/test/template/form_helper_test.rb b/actionview/test/template/form_helper_test.rb
index e7b249cc9c..6a317e1a12 100644
--- a/actionview/test/template/form_helper_test.rb
+++ b/actionview/test/template/form_helper_test.rb
@@ -747,19 +747,19 @@ class FormHelperTest < ActionView::TestCase
   end
 
   def test_check_box_with_explicit_checked_and_unchecked_values_when_object_value_is_big_decimal
-    @post.secret = BigDecimal.new(0)
+    @post.secret = BigDecimal(0)
     assert_dom_equal(
       '<input name="post[secret]" type="hidden" value="1" /><input checked="checked" id="post_secret" name="post[secret]" type="checkbox" value="0" />',
       check_box("post", "secret", {}, 0, 1)
     )
 
-    @post.secret = BigDecimal.new(1)
+    @post.secret = BigDecimal(1)
     assert_dom_equal(
       '<input name="post[secret]" type="hidden" value="1" /><input id="post_secret" name="post[secret]" type="checkbox" value="0" />',
       check_box("post", "secret", {}, 0, 1)
     )
 
-    @post.secret = BigDecimal.new(2.2, 1)
+    @post.secret = BigDecimal(2.2, 1)
     assert_dom_equal(
       '<input name="post[secret]" type="hidden" value="1" /><input id="post_secret" name="post[secret]" type="checkbox" value="0" />',
       check_box("post", "secret", {}, 0, 1)
diff --git a/actionview/test/template/tag_helper_test.rb b/actionview/test/template/tag_helper_test.rb
index f85a6b2f46..a746b9c1b5 100644
--- a/actionview/test/template/tag_helper_test.rb
+++ b/actionview/test/template/tag_helper_test.rb
@@ -316,18 +316,18 @@ class TagHelperTest < ActionView::TestCase
   def test_data_attributes
     ["data", :data].each { |data|
       assert_dom_equal '<a data-a-float="3.14" data-a-big-decimal="-123.456" data-a-number="1" data-array="[1,2,3]" data-hash="{&quot;key&quot;:&quot;value&quot;}" data-string-with-quotes="double&quot;quote&quot;party&quot;" data-string="hello" data-symbol="foo" />',
-        tag("a", data => { a_float: 3.14, a_big_decimal: BigDecimal.new("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
+        tag("a", data => { a_float: 3.14, a_big_decimal: BigDecimal("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
       assert_dom_equal '<a data-a-float="3.14" data-a-big-decimal="-123.456" data-a-number="1" data-array="[1,2,3]" data-hash="{&quot;key&quot;:&quot;value&quot;}" data-string-with-quotes="double&quot;quote&quot;party&quot;" data-string="hello" data-symbol="foo" />',
-        tag.a(data: { a_float: 3.14, a_big_decimal: BigDecimal.new("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
+        tag.a(data: { a_float: 3.14, a_big_decimal: BigDecimal("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
     }
   end
 
   def test_aria_attributes
     ["aria", :aria].each { |aria|
       assert_dom_equal '<a aria-a-float="3.14" aria-a-big-decimal="-123.456" aria-a-number="1" aria-array="[1,2,3]" aria-hash="{&quot;key&quot;:&quot;value&quot;}" aria-string-with-quotes="double&quot;quote&quot;party&quot;" aria-string="hello" aria-symbol="foo" />',
-        tag("a", aria => { a_float: 3.14, a_big_decimal: BigDecimal.new("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
+        tag("a", aria => { a_float: 3.14, a_big_decimal: BigDecimal("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
       assert_dom_equal '<a aria-a-float="3.14" aria-a-big-decimal="-123.456" aria-a-number="1" aria-array="[1,2,3]" aria-hash="{&quot;key&quot;:&quot;value&quot;}" aria-string-with-quotes="double&quot;quote&quot;party&quot;" aria-string="hello" aria-symbol="foo" />',
-        tag.a(aria: { a_float: 3.14, a_big_decimal: BigDecimal.new("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
+        tag.a(aria: { a_float: 3.14, a_big_decimal: BigDecimal("-123.456"), a_number: 1, string: "hello", symbol: :foo, array: [1, 2, 3], hash: { key: "value" }, string_with_quotes: 'double"quote"party"' })
     }
   end