Merged from REXML main repository:

Fixes ticket:68.
  NOTE that this involves an API change!  Entity declarations in the doctype
  now generate events that carry two, not one, arguments.

Implements ticket:15, using gwrite's suggestion.  This allows Element to be
subclassed.

Two unrelated changes, because subversion is retarded and doesn't do
block-level commits:

  1) Fixed a typo bug in previous change for ticket:15
  2) Fixed namespaces handling in XPath and element.  

    ***** Note that this is an API change!!! *****

    Element.namespaces() now returns a hash of namespace mappings which are
    relevant for that node.

Fixes a bug in multiple decodings

The changeset 1230:1231 was bad.  The default behavior is *not* to use the
native REXML encodings by default, but rather to use ICONV by default.  I know
that this will piss some people off, but defaulting to the pure Ruby version
isn't the correct solution, and it breaks other encodings, so I've reverted it.

* Fixes ticket:61 (xpath_parser)
* Fixes ticket:63 (UTF-16; UNILE decoding was bad)
* Cleans up some tests, removing opportunities for test corruption
* Improves parsing error messages a little
* Adds the ability to override the encoding detection in Source construction
* Fixes an edge case in Functions::string, where document nodes weren't 
  correctly converted
* Fixes Functions::string() for Element and Document nodes
* Fixes some problems in entity handling

Addresses ticket:66

Fixes ticket:71

Addresses ticket:78
  NOTE: that this also fixes what is technically another bug in REXML.  REXML's
  XPath parser used to allow exponential notation in numbers.  The XPath spec
  is specific about what a number is, and scientific notation is not included.
  Therefore, this has been fixed.

Cross-ported a fix for ticket:88 from CVS.

Fixes ticket:80

Documentation cleanup.  Ticket:84

Applied Kou's fix for an un-trac'ed bug.

------------------------------------------------------------------------


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11548 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rexml/encoding.rb

@@ -24,20 +24,20 @@ module REXML
       old_verbosity = $VERBOSE
       begin
         $VERBOSE = false
-				enc = enc.nil? ? nil : enc.upcase
+        enc = enc.nil? ? nil : enc.upcase
         return false if defined? @encoding and enc == @encoding
         if enc and enc != UTF_8
-					@encoding = enc
-					raise ArgumentError, "Bad encoding name #@encoding" unless @encoding =~ /^[\w-]+$/
-					@encoding.untaint 
-					enc_file = File.join( "rexml", "encodings", "#@encoding.rb" )
-					begin
-						require enc_file
-						Encoding.apply(self, @encoding)
+          @encoding = enc
+          raise ArgumentError, "Bad encoding name #@encoding" unless @encoding =~ /^[\w-]+$/
+          @encoding.untaint 
+          begin
+            require 'rexml/encodings/ICONV.rb'
+            Encoding.apply(self, "ICONV")
           rescue LoadError, Exception
-						begin
-							require 'rexml/encodings/ICONV.rb'
-							Encoding.apply(self, "ICONV")
+            begin
+              enc_file = File.join( "rexml", "encodings", "#@encoding.rb" )
+              require enc_file
+              Encoding.apply(self, @encoding)
             rescue LoadError => err
               puts err.message
               raise ArgumentError, "No decoder found for encoding #@encoding.  Please install iconv."
@@ -51,14 +51,14 @@ module REXML
       ensure
         $VERBOSE = old_verbosity
       end
-			true
+      true
     end
 
     def check_encoding str
       # We have to recognize UTF-16, LSB UTF-16, and UTF-8
       return UTF_16 if /\A\xfe\xff/n =~ str
       return UNILE if /\A\xff\xfe/n =~ str
-      str =~ /^\s*<?xml\s*version\s*=\s*(['"]).*?\2\s*encoding\s*=\s*(["'])(.*?)\2/um
+      str =~ /^\s*<?xml\s*version=(['"]).*?\2\s*encoding=(["'])(.*?)\2/um
       return $1.upcase if $1
       return UTF_8
     end