Fix case of `YAML`

activesupport/lib/active_support/ordered_hash.rb

@@ -17,7 +17,7 @@ module ActiveSupport
   #
   # Also, maps the +omap+ feature for YAML files
   # (See https://yaml.org/type/omap.html) to support ordered items
-  # when loading from yaml.
+  # when loading from YAML.
   #
   # <tt>ActiveSupport::OrderedHash</tt> is namespaced to prevent conflicts
   # with other implementations.

activesupport/test/core_ext/string_ext_test.rb

@@ -1009,7 +1009,7 @@ class OutputSafetyTest < ActiveSupport::TestCase
     assert_predicate string, :html_safe?
   end
 
-  test "emits normal string yaml" do
+  test "emits normal string YAML" do
     assert_equal "foo".to_yaml, "foo".html_safe.to_yaml(foo: 1)
   end