* lib/rexml/parsers/streamparser.rb
  (REXML::Parsers::StreamParser#parse): Add "entity" event support to
  listener. [Bug #8689] [ruby-dev:47542]
  Reported by Ippei Obayashi.
* test/rexml/test_stream.rb (StreamTester#entity): Add a test for
  the above case.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42198 b2dd03c8-39d4-4d8f-98ff-823fe69b080e