REXML changes backported from the 1.9 branch:

* Minor source documentation changes
* Changes to the pretty-printing code, including the addition of the word-
  wrap submission.
* Bug fix for missing quotations in NOTATION DTD items
* Bug fixes and improvements to whitespace handling in text nodes
* Refactoring and bug fixes in encoding support
* Minor speed optimizations in the core parser
* Bug fixes in the SAX2 parserthe core parser
* Copyright fixes
* Version bump to REXML 3.0.0
* A change that caused speed degredation has been reversed
* Addition of a value=() method in Text, for replacing the contents of
  a text node
* Fixed the document order of the descendant-or-self axis in XPath


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6071 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rexml/source.rb

@@ -31,7 +31,6 @@ module REXML
 		def initialize(arg)
 			@orig = @buffer = arg
 			self.encoding = check_encoding( @buffer )
-			#@buffer = decode(@buffer) unless @encoding == UTF_8
 			@line = 0
 		end
 
@@ -96,7 +95,7 @@ module REXML
 
 		# @return true if the Source is exhausted
 		def empty?
-			@buffer.nil?
+			@buffer == ""
 		end
 
 		# @return the current line in the source
@@ -113,17 +112,14 @@ module REXML
 	class IOSource < Source
 		#attr_reader :block_size
 
+    # block_size has been deprecated
 		def initialize(arg, block_size=500)
 			@er_source = @source = arg
 			@to_utf = false
-			# READLINE OPT
-			# The following was commented out when IOSource started using readline
-			# to pull the data from the stream.
-			#@block_size = block_size
-			#super @source.read(@block_size)
-			@line_break = '>'
-			#super @source.readline( "\n" )
-			super @source.readline( @line_break )+@source.read
+      # FIXME
+      # This is broken.  If the user puts in enough carriage returns, this can fail
+      # to calculate the correct encoding.
+      super @source.read( 100 )
 			@line_break = encode( '>' )
 		end