* lib/rdoc/*, test/rdoc/*: Update rdoc-5.0.0.beta2

Fixed ri parse defect with left-hand matched classes.
  https://github.com/rdoc/rdoc/pull/420

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56097 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/markup/parser.rb

@@ -79,8 +79,6 @@ class RDoc::Markup::Parser
     @binary_input   = nil
     @current_token  = nil
     @debug          = false
-    @have_encoding  = Object.const_defined? :Encoding
-    @have_byteslice = ''.respond_to? :byteslice
     @input          = nil
     @input_encoding = nil
     @line           = 0
@@ -324,15 +322,7 @@ class RDoc::Markup::Parser
   # The character offset for the input string at the given +byte_offset+
 
   def char_pos byte_offset
-    if @have_byteslice then
-      @input.byteslice(0, byte_offset).length
-    elsif @have_encoding then
-      matched = @binary_input[0, byte_offset]
-      matched.force_encoding @input_encoding
-      matched.length
-    else
-      byte_offset
-    end
+    @input.byteslice(0, byte_offset).length
   end
 
   ##
@@ -430,11 +420,6 @@ class RDoc::Markup::Parser
     @line_pos = 0
     @input    = input.dup
 
-    if @have_encoding and not @have_byteslice then
-      @input_encoding = @input.encoding
-      @binary_input   = @input.force_encoding Encoding::BINARY
-    end
-
     @s = StringScanner.new input
   end
 
@@ -556,4 +541,3 @@ class RDoc::Markup::Parser
   end
 
 end
-