Add default exceptions affected by suppress (#25099)

* Add default exceptions affected by suppress

    suppress { do_something_that_might_fail }

    # instead of

    begin
      do_something_that_might_fail
    rescue
    end

    # or

    do_something_that_might_fail rescue nil

* Do not add default exceptions list constant

[Rafael Mendonça França + Alexey Zapparov]

activesupport/lib/active_support/core_ext/kernel/reporting.rb

@@ -37,6 +37,7 @@ def with_warnings(flag)
   #
   #   puts 'This code gets executed and nothing related to ZeroDivisionError was seen'
   def suppress(*exception_classes)
+    exception_classes = StandardError if exception_classes.empty?
     yield
   rescue *exception_classes
   end

activesupport/test/core_ext/kernel_test.rb

@@ -42,6 +42,15 @@ def test_reraise
     end
   end
 
+  def test_suppress_with_defaults
+    suppress { raise RuntimeError }
+    suppress { raise ArgumentError }
+
+    assert_raise(LoadError) do
+      suppress { raise LoadError }
+    end
+  end
+
   def test_suppression
     suppress(ArgumentError) { raise ArgumentError }
     suppress(LoadError) { raise LoadError }