* lib/rdoc.rb: Import RDoc 3.7 release candidate

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32115 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/markup/pre_process.rb

@@ -74,6 +74,13 @@ class RDoc::Markup::PreProcess
         filename = param.split[0]
         encoding = if defined?(Encoding) then text.encoding else nil end
         include_file filename, prefix, encoding
+      when 'category' then
+        if RDoc::Context === code_object then
+          section = code_object.add_section param, ''
+          code_object.temporary_section = section
+        end
+
+        '' # ignore category if we're not on an RDoc::Context
       else
         result = yield directive, param if block_given?