* Merge Onigmo 5.13.4 f22cf2e566712cace60d17f84d63119d7c5764ee.
  [bug] fix problem with optimization of \z (Issue #16) [Bug #8210]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40276 b2dd03c8-39d4-4d8f-98ff-823fe69b080e