* Message less confusing error to human

* Problem: Following error message is not helpful, because you have to reason
  that '' actually means it's in the top-level, and the 'div' (not '</div>') is
  an end tag

        require "rexml/parsers/lightparser"
        REXML::Parsers::LightParser.new('</div>').parse
        #=> Missing end tag for '' (got 'div')

* Solution: add a special case in error handling just to change the error message

        require "rexml/parsers/lightparser"
        REXML::Parsers::LightParser.new('</div>').parse
        #=> Unexpected top-level end tag (got 'div')

* Refactor by removing unnecessary `md` check

* Thanks @a_matsuda to review this at asakusa.rb!

https://github.com/ruby/rexml/commit/f6528d4477

It restores removed REXML::Parsers::BaseParser::UNQME_STR.
Because it's used by kramdown.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66536 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

See https://github.com/ruby/rexml/blob/master/NEWS.md for change summary.

Changes for spec/ has been reported: https://github.com/ruby/spec/pull/639


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66458 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

[#15206] [Fix GH-1976]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

It doesn't mean that all elements which name "ELEMENT_NAME" with any
namespace URI including null namespace URI. It means that all elements
which name "ELEMENT_NAME" with null namespace URI.

https://www.w3.org/TR/1999/REC-xpath-19991116/#NT-NodeTest

> if the QName does not have a prefix, then the namespace URI is null
> (this is the same way attribute names are expanded).

We need to use "*[local-name()='#{ELEMENT_NAME}']" for all elements
which name "ELEMENT_NAME" with any namespace URI including null
namespace URI in XPath 1.0. But it's inconvenient. So this change
includes "*:#{LOCAL_NAME}" syntax support that is introduced since
XPath 2.0.

* lib/rexml/parsers/xpathparser.rb: Support "*:#{LOCAL_NAME}" syntax that
  is introduced since XPath 2.0.

* lib/rexml/xpath_parser.rb:
  * Fix namespace URI processing for "#{ELEMENT_NAME}". Now,
    "#{ELEMENT_NAME}" doesn't accept elements with null namespace URI.
  * Add "*:#{LOCAL_NAME}" support.

* test/rexml/test_contrib.rb,
  test/rexml/test_core.rb,
  test/rexml/xpath/test_base.rb: Follow this change.

* test/rexml/test_jaxen.rb: Fix namespace processing.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63236 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rexml/parsers/xpathparser.rb: Ignore white spaces in relative
location path.

test/rexml/xpath/test_base.rb: Add more test patterns and use more
debug friendly assertion style.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

[Bug #14600]

* lib/rexml/parsers/xpathparser.rb: Fix a bug that "N-M" requires a space
  before "-".


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

    
[Bug #14600]
    
* lib/rexml/functions.rb: Fix a bug that "function()/path" always returns
  nothing.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63086 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

[ruby-core:81593] [Bug #13636]

Reported by Anton Sivakov. Thanks!!!


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