Problem due to commit 75d15117643d17a3c3d92b41512bd7840c91705b included with 6.12.0

First of all, I should add that this is not really a bug, more of an uncomfortable compatibility problem, but README encourages me to report anything I have a problem with (nice, thanks!), so here's the problem:

I have a project which inherits from RDoc::Parser::C to generate documention for its ruby bindings.

module RDoc

    class C_Parser_Paludis < Parser::C
        #override C_Parse
        parse_files_matching(/\.(c|cc|cpp|CC)$/)

        def initialize(top_level, file_name, body, options, stats)
            ...
            super(top_level, file_name, new_body, options, stats)
        end
    ...
    end
end
begin
    r = RDoc::RDoc.new
    r.document(ARGV)
rescue RDoc::Error => e
    $stderr.puts e.message
    exit(1)
end

(Full code here: https://gitlab.exherbo.org/paludis/paludis/-/blob/master/doc/api/ruby/create_ruby_doc.rb)

After updating ruby 3.4.4 to 3.4.5, which updated rdoc from 6.10.0 to 6.14.0 I get:

RDoc is not a full Ruby parser and will fail when fed invalid ruby programs.

The internal error was:

        (ArgumentError) wrong number of arguments (given 4, expected 5)

/home/heiko/Quelltexte/git-sources/exherbo/paludis/doc/api/ruby/create_ruby_doc.rb:13:in 'initialize': wrong number of arguments (given 4, expected 5) (ArgumentError)
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/parser.rb:194:in 'Class#new'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/parser.rb:194:in 'RDoc::Parser.for'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/rdoc.rb:350:in 'RDoc::RDoc#parse_file'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/rdoc.rb:406:in 'block in RDoc::RDoc#parse_files'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/rdoc.rb:404:in 'Array#map'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/rdoc.rb:404:in 'RDoc::RDoc#parse_files'
        from /usr/x86_64-pc-linux-gnu/lib/ruby/3.4/rdoc/rdoc.rb:467:in 'RDoc::RDoc#document'
        from /home/heiko/Quelltexte/git-sources/exherbo/paludis/doc/api/ruby/create_ruby_doc.rb:87:in '<main>'

This is "caused" by 75d15117643d17a3c3d92b41512bd7840c91705b, which changed initialize's signature. I could conditionalize the call to super(..), but I don't know how to do that for C_Parser_Paludis's initialize itself.

Any pointers how this could be best solved without requiring rdoc >= 6.12.0 would be very welcome.

Start with doc/api/ruby/create_ruby_doc.rb, especially C_Parser_Paludis#initialize, and inspect the parser construction path in rdoc/parser.rb. Compare the initializer contract before and after commit 75d15117643d17a3c3d92b41512bd7840c91705b, then verify a compatibility approach that works without requiring RDoc >= 6.12. Done means the documented Ruby binding generation flow no longer raises the argument-count error across the affected RDoc versions.