WEBrick development server returns wrong charset on 404

[sentience]

With the Jekyll development server running, if you request a URL that does not exist, the server responds with the rendered contents of 404.html (correct), but with the wrong encoding specified in the Content-Type header:

$ wget http://localhost:4000/bad-url.html --content-on-error -S
--2014-05-03 16:32:24--  http://localhost:4000/bad-url.html
Resolving localhost... ::1, 127.0.0.1, fe80::1
Connecting to localhost|::1|:4000... failed: Connection refused.
Connecting to localhost|127.0.0.1|:4000... connected.
HTTP request sent, awaiting response...
  HTTP/1.1 404 Not Found
  Content-Type: text/html; charset=ISO-8859-1
  Server: WEBrick/1.3.1 (Ruby/2.1.1/2014-02-24)
  Date: Sat, 03 May 2014 06:32:24 GMT
  Content-Length: 6727
  Connection: close
Saving to: 'bad-url.html'

100%[================================================================================================================================================>] 6,727       --.-K/s   in 0s

Note the Content-Type header says charset=ISO-8859-1 even though I am running Jekyll 2.0.0rc1, which is supposed to default to UTF-8 (and does so for all other pages).

[doktorbro]

Same here with Jekyll 1.5.1:

Content-Type

text/html; charset=ISO-8859-1

Server

WEBrick/1.3.1 (Ruby/1.9.3/2011-10-30)

[parkr]

oh hey https://github.com/ruby/ruby/blob/trunk/lib/webrick/httpresponse.rb#L341

looks like a webrick issue