ruby/ruby — comment on commit 6ef323d6f8a4cb768ce8217171487d8932bc7bd8
File:  line 0
By tenderlove:

@rkh the [content-length header isn't removed for those response codes](https://github.com/ruby/ruby/blob/trunk/lib/webrick/httpresponse.rb#L187-189). So you can send a 205 and 1xx response with a content length and not receive this warning.