Import RDoc r101.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/markup/preprocess.rb

@@ -14,21 +14,25 @@ class RDoc::Markup::PreProcess
 
   ##
   # Look for common options in a chunk of text. Options that we don't handle
-  # are passed back to our caller as |directive, param|
+  # are yielded to the caller.
 
   def handle(text)
-    text.gsub!(/^([ \t#]*):(\w+):\s*(.+)?\n/) do
+    text.gsub!(/^([ \t]*#?[ \t]*):(\w+):([ \t]*)(.+)?\n/) do
+      next $& if $3.empty? and $4 and $4[0, 1] == ':'
+
       prefix    = $1
       directive = $2.downcase
-      param     = $3
+      param     = $4
 
       case directive
-      when "include"
+      when 'include' then
         filename = param.split[0]
-        include_file(filename, prefix)
+        include_file filename, prefix
 
       else
-        yield(directive, param)
+        result = yield directive, param
+        result = "#{prefix}:#{directive}: #{param}\n" unless result
+        result
       end
     end
   end