Allow optional : before call-seq:

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6616 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/parsers/parse_rb.rb

@@ -1979,7 +1979,7 @@ module RDoc
       # Look for a 'call-seq' in the comment, and override the
       # normal parameter stuff
 
-      if comment.sub!(/call-seq:(.*?)^\s*\#?\s*$/m, '')
+      if comment.sub!(/:?call-seq:(.*?)^\s*\#?\s*$/m, '')
         seq = $1
         seq.gsub!(/^\s*\#\s*/, '')
         meth.call_seq = seq