Ruby » Ruby master

• lib/rexml/parsers/xpathparser.rb
  (REXML::Parsers::XPathParser#parse),
  test/rexml/test_elements.rb
  (ElementsTester::test_each_with_frozen_condition):
  don't modify original XPath. fixes #4164
  Reported by Pavel Shved. Thanks!!!

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31995 b2dd03c8-39d4-4d8f-98ff-823fe69b080e