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diff --git a/jni/ruby/lib/rdoc/rd.rb b/jni/ruby/lib/rdoc/rd.rb
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+##
+# RDoc::RD implements the RD format from the rdtool gem.
+#
+# To choose RD as your only default format see
+# RDoc::Options@Saved+Options for instructions on setting up a
+# <code>.doc_options</code> file to store your project default.
+#
+# == LICENSE
+#
+# The grammar that produces RDoc::RD::BlockParser and RDoc::RD::InlineParser
+# is included in RDoc under the Ruby License.
+#
+# You can find the original source for rdtool at
+# https://github.com/uwabami/rdtool/
+#
+# You can use, re-distribute or change these files under Ruby's License or GPL.
+#
+# 1. You may make and give away verbatim copies of the source form of the
+#    software without restriction, provided that you duplicate all of the
+#    original copyright notices and associated disclaimers.
+#
+# 2. You may modify your copy of the software in any way, provided that
+#    you do at least ONE of the following:
+#
+#    a. place your modifications in the Public Domain or otherwise
+#       make them Freely Available, such as by posting said
+#       modifications to Usenet or an equivalent medium, or by allowing
+#       the author to include your modifications in the software.
+#
+#    b. use the modified software only within your corporation or
+#       organization.
+#
+#    c. give non-standard binaries non-standard names, with
+#       instructions on where to get the original software distribution.
+#
+#    d. make other distribution arrangements with the author.
+#
+# 3. You may distribute the software in object code or binary form,
+#    provided that you do at least ONE of the following:
+#
+#    a. distribute the binaries and library files of the software,
+#       together with instructions (in the manual page or equivalent)
+#       on where to get the original distribution.
+#
+#    b. accompany the distribution with the machine-readable source of
+#       the software.
+#
+#    c. give non-standard binaries non-standard names, with
+#       instructions on where to get the original software distribution.
+#
+#    d. make other distribution arrangements with the author.
+#
+# 4. You may modify and include the part of the software into any other
+#    software (possibly commercial).  But some files in the distribution
+#    are not written by the author, so that they are not under these terms.
+#
+#    For the list of those files and their copying conditions, see the
+#    file LEGAL.
+#
+# 5. The scripts and library files supplied as input to or produced as
+#    output from the software do not automatically fall under the
+#    copyright of the software, but belong to whomever generated them,
+#    and may be sold commercially, and may be aggregated with this
+#    software.
+#
+# 6. THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
+#    IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+#    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+#    PURPOSE.
+
+class RDoc::RD
+
+  ##
+  # Parses +rd+ source and returns an RDoc::Markup::Document.  If the
+  # <tt>=begin</tt> or <tt>=end</tt> lines are missing they will be added.
+
+  def self.parse rd
+    rd = rd.lines.to_a
+
+    if rd.find { |i| /\S/ === i } and !rd.find{|i| /^=begin\b/ === i } then
+      rd.unshift("=begin\n").push("=end\n")
+    end
+
+    parser = RDoc::RD::BlockParser.new
+    document = parser.parse rd
+
+    # isn't this always true?
+    document.parts.shift if RDoc::Markup::BlankLine === document.parts.first
+    document.parts.pop   if RDoc::Markup::BlankLine === document.parts.last
+
+    document
+  end
+
+  autoload :BlockParser,  'rdoc/rd/block_parser'
+  autoload :InlineParser, 'rdoc/rd/inline_parser'
+  autoload :Inline,       'rdoc/rd/inline'
+
+end
+